I can't tell you how to plan the perfect party for this because it really depends on the boundaries agreed upon by the bride and groom. Sticking to that is essentially, in my opinion, what's most important. If they say no strippers, then don't get strippers. Nothing is worse than a fight over something like that before a wedding.
I can tell you about the two parties I attended. The first one, I was nine and they played wildy inappropriate movies like Cape Fear and other crap like that and it was just me, my sister and her best friend. It was extremely lame and we did it at home. But, in reality that was the only option when living in a podunk town.
The second was for my eldest sister and we went to a restaurant where I watched her and her friends down fru-fru drinks while I munched on outrageously expensive appetizers because I was still underage and couldn't drink. We then went back to a friend's house where we all pretended to be interested in the pool table and the incessant and never-ending ramblings of my sister as I watched her snort lines of cocaine all night long.
It's a stab in the dark, but I'm gonna say that both of those parties would earn the "You're Doing It Wrong" tag.