It's also a great way to make friends with similar interests, which leads itself to all kinds of fun.
Too many people spend a frankly stupid amount of time worrying about wasting their youth, or make up for it by spending their twenties in a drunken stupor.
Think about it. Would you rather hit thirty, and have built a few things that you can be really proud of, and take a shot at making some real dosh, or just look back on a bunch of parties?