My (31f) friend (28m) has become a terrible alcoholic. Our social circle (late 20s-early 30s m/f) has noticed his decline, we don't know how to help him, or if we even can?

There is an individual in my social circle, whom I’ll call Mike, who has become an alcoholic. Several other members in this group have noticed it too, and we’re not exactly sure how we can help him, or if it’s even possible to help him.
I’ve known Mike for nearly 10 years now, several other members in this circle have known him for even longer. He has always been the type to enjoy going out and partying. When our group was together we would all go out and drink and have a good time (and taxi/walk back to someone’s home afterwards) fairly frequently. This was also a time when most of us were in our early-mid 20’s and didn’t have as many responsibilities as we do now. Because of this history of all of us going out to bars or drinking excessively in the past I feel that it’s either hypocritical or our help will mean less because of this past we had together.
Over the years we went out to the downtown area less and less, and started to either stay in more to make dinner and have a drink or two. When we’re feeling adventurous we may hit up a local brewery together and sit down for a beer when we had the time. These kinds of activities happen less and less, most of us are getting married, having kids, or have a more taxing work schedule, or are traveling more. FWIW, Mike has been successful in his career, but is not interested in settling down or having kids - I don't think this increased drinking behavior is due to anything career or wanting to have a family.
When we do go out together as group to eat, Mike will join us and would end up drinking twice as much as everyone else. He will typically uber to where we will be going either because he’s already intoxicated or he plans on getting wasted.
Recently his drinking habits have gone far beyond what is socially acceptable and he is now going down a dangerous path. Here are a few examples:

• He noticeably has the shakes, when he tries to show you something on his phone his hand tremors are really, really bad and it’s hard to even focus on the image or gif he is trying to show you b/c his hand is shaking so much.
• Several weeks ago he met my fiancé and I out at a nearby brewery. My fiancé and I wanted to hang out and have a beer or two and go home. Mike had ubered to this brewery to see us b/c he had been drinking with someone else prior and was already visibly intoxicated when he arrived. While at the brewery he only ordered beers with the highest ABV on purpose and had several. Before leaving the brewery he saw that a woman who had just left the establishment leave a mostly full glass of wine on her table, and proceeded to chug this glass of wine in one gulp.
• Our group of friends went to a mountain house for a small weekend getaway. Mike was there with us. He had finished one box of wine in one day. The next day he began drinking around 10 or 11 am while we were all going on a nature walk and trying to enjoy the outdoors.
• He will frequently retell his stories over and over and over again - because he has forgotten that he even told me or someone else the same story. For example, he may tell me an in depth story about something that happened to him recently on Sunday, if I see him again on the following Tuesday - he will retell me the same story of the same event, and not realize that we already had this conversation.
• He has become incredibly rude and mean. He will frequently interrupt someone who is speaking to talk about an entirely different subject. He will blatantly say that he doesn’t care about someone recalling the event of their day or that their story is boring. It’s like he is unaware of his actions and ignoring people around him.
• He practically spends almost every evening drinking, and drinks all day on the weekends. The only time he doesn’t drink is when he is at work. (I’m fairly certain about him not drinking at work because he works in the type of environment where no alcohol is allowed on the premise. He could be fired and the company would be heavily fined if any employee were to come to work intoxicated or even have a bottle on them even if completely sober).

I spoke with a mutual friend about his behavior and how his drinking as gotten dramatically worse. She has agreed that his drinking as become out of control. Both of us admitted that we have been avoiding spending time with him b/c being around him when he’s drunk (which is almost always) has been mentally and emotionally exhausting and we can’t be around it anymore. However, we still love and care about our friend. We see that what he is doing is terrible for his health and if he keeps up this lifestyle he won’t be living a long life. We thought about approaching him to see if we could talk about his drinking - an intervention of sorts.
My questions are - 1 - Is it even a good idea to try to talk to our friend about his bad drinking habits? Especially when our entire social circle enjoys drinking? (We just don’t get plastered everyday, or ever anymore) 2 - If we were to approach this subject with him - what would be the best way to accomplish this? Should it be our entire group of friends? Or just a few of us? 3 - For those of you who have had an intervention for a friend - what happened? how did they take it? what should we expect if we decide to confront Mike?
tl;dr: A friend of mine is a hard core alcoholic, he drinks all the time, has the shakes, his health is declining, etc.. How (or can we?) can our social circle intervene with his extremely unhealthy lifestyle of drinking? Especially if most of us use to be his drinking buddies..
Edit: Grammar and clarity.


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