I won't do anything strip club related; much more expensive and the service won't be great... These places are notorious for milking customers. Do you want to drink a $1,000 champagne bottle?
My suggestions:
- First, get the hotel suite, the booze, the porn, etc. by yourself. You won't need anyone to organize this for you. One big "presidential suite" is good enough for 10 - 20 people. Plenty of hotels can provide it.
- Second, get in touch with a reputed, independent provider. Ideally someone you know. Most ladies have friends, so let her bring the girls to the party. Get a deal with her on # of ladies, for how many hours, the basic service provided. Then if you have horny friends, let them deal directly for any "additional".
If you don't know an independent, then and only then, I would consider going to an agency. But only deal with them related to the girls. Do your homework for all other party amenities.