Bachelor party coming up, need advice

Man of honor for my best friend's wedding. I need advice on acquiring pills. I'm not even sure the type of pills I should try to find so input on that would be welcome also. I've been told to get something fun? That won't make us nauseous. There will be 15 or so of us going out, I'd like to make this awesome for everyone but I'm clueless. It's been 20+ years since I've touched anything (weed in highschool) and I just don't know where I should try to look. Craigslist? Bars? Advice?

Thanks in advance!