I'm not going to try and cover everything but here's the most important thing: join in and participate.
In case you've never had strippers in room let me break down what I mean. At some point while the girls are there they'll have some corny games that they'll want the bachelor and party-goers to play. Now everyone will pressure the bachelor and he'll go along with it since it's all in fun but the absolute worst thing is when half the people there act like douchebags and just sit on the sidelines and don't mix it up in the thick of things.
If you're going to be lame, stay home. If you're the one throwing the party - set up the ground rules from the first email you send out. Party goers are supposed to be fun and not sitting on the sidelines judging. If you want to judge go look in the mirror and judge yourself on the a$$hole factor.
Now go out and get your face covered in whip cream!
Brian - Atlantic City Bachelor Party