Hang in there and yes you do have something in common with every single person in that room. You are all sitting there because you all have a desire to quit drinking. It is hard at first to see past the differences to find the things in common but they are there. If you are uncomfortable with this meeting, try another one because there are meetings with more younger people. Areas around colleges or universities. Where the post college young adults live. There is someplace for you and you will find it but those older people were all you once, trying to quit and stay quit.