However, I do enjoy getting drunk. I've never drunk so much I threw up, or fell over, or hit anyone, or... etc. But yes, when I'm out with friends or colleagues we will happily enjoy a night with much alcohol flowing - enough to be classed by the UK government as "booze drinking", at least.
I sometimes do or say something I feel embarassed about afterwards (most recent example was a conversation about poetry with a London taxi driver at ~5am), but nothing I've been ashamed of.
Sure, I can have fun without alcohol. Sometimes I do - certainly I've never had the thought that being drunk is a requirement for having fun. It just provides a different type of fun. Different things make you laugh, you have different conversations...
Obviously these things vary for different people, I've known people who I don't want to be around when they're drunk - but also plenty of people just like me.
edit: Just read the first paragraph of this comment and thought "I wrote that myself and even I think that sounds like an alcoholic in denial". When I'm out and drinking I'll drink a lot, when I'm at home I'll have a glass or two over an evening. If I tried to get drunk off the whisky I have at home it would be a really expensive night.