Strange seeing this question in sexuality but apparently a bachelor party is kind of sexual related in the States much more so than it is in Europe, well at least in Belgium, the country I'm from.
Allthough a personal stripper or going to a strip club is sometimes included here to - the real traditional way of doing it is simply to go to bars and getting the groom intoxicated with alcohol, then when he's drunk enough and is practicly begging to go home, you take away all his posessions like wallet and mobile phone, watch etc (you can even strip him, but that's a bit over the top - it happens, but it's not very common practice - I wouldn't advice it) and then just drop him somewhere in a desolated place in a location far enough away from where he lives (upto a 100 km) late at night say 4 am.
The rest of the crew just heads home or those who are still up to it go visit some more bars. The groom simply has got to find his way back alone - usually the bride is very pissed off because of that, but it's not like it's unexpected for her, it's tradition to do it and equally the tradition to piss of the soon to become "wife" - the more upset she gets, the more you can claim that you've held a good bachelor party - now that's what I call culture
