...while on a bachelor weekend???

A buddy of mine is getting married.... (sad, I know, but I can't talk him out of it...

)
He has invited a bunch of us to accompany him on his bachelor fest weekend in Riga, Latvia's capital. Flight and four star hotel, all paid for....
Now I'm looking for people who have been there, know where to go. I'm not talking bridge clubs either, strip-clubs, bars with hot women, disco's, that kind of stuff. (also places to avoid...)
All suggestions are welcome!!!