How about learning to develop a new skill?
That is working on having more fun on nights without alcohol.

What alcohol does is that it makes us more relaxed and do more dumb shit that we're otherwise embarrased to do.

A year ago, I've started to go out ocasoinally while not drinking at all. What I figured out was that you can behave as wacky as everybody else does, and all the people except your friends wil think that you're drunk too. Once you find out that alcohol i not a most for having fun, just your friends remain the obstacle. This can be used to training yourself not to be influenced by others. This may be challenging and too strict, but guess who's gonna feel the best in the morning?