One thing that I'd miss is the taste though, I don't drink soda or sugary drinks, and I can't think of a replacement for the taste of good wine, beer or spirits. (there's good dealcoolized beers nowadays but it feels like cheating). Not that I guess one absolutely needs it, but is still part of the culinary experience. It's probably because I never looked though, is there anything non alcoholic that "grown ups" drink?