Since other people are making the arrangements, I assume that you are not hosting this party and your role is Guest of Honor. It is the hosts who determine what kind of party they will give, who they will invite, and so on. The guests, even the Guest of Honor, has no control over these matters. A guest is free to decline the invitation, but not to tell hosts how to manage their own party.
That said, you aren't the first Bach Party Guest of Honor to find him/herself in this awkward position. While the hosts are delighted to be able to plan and give the sort of racy wild party that includes strippers. the Guest of Honor is decidedly uninterested in racy parties and strippers. And so the GOH is left with choosing between (1) refusing to be involved and thereby being "the spoil sport" who ruins everyone's fun, or (2) going along to get along and thereby (possibly) creating problems between bride and groom.
My usual advice is "Go along to get along, but be a detached observer rather than an enthusiastic participant in the wild aspects of the party. AND insist that someone your spouse-to-be trusts is included in the party to observe and report that you acted as a detached observer rather than enthusiastic participant in any wild goings on." This way the friends have the fun of their party while the bride or groom is able to make a verifiable claim that "I just enjoyed the food and drink and seeing my friends; I didn't have anything to do with the strippers."
My thought is that brides and grooms (and their families) are free to host (and so control) parties if they wish -- with the exception of "bring me a present" parties like showers. So if a bride or groom wants a pre-wedding night on the town, then the bride or groom is free to host such an event. But if someone else is hosting such an event, your choice is to take it or leave it, never to try to wrest control of the party from the party's hosts.
Of course if one attends a party and things are so wild as to include actual sex -- not just sexy dancing and joking around, but actual sex -- it's OK for anybody, even the Guest of Honor, to quietly leave that situation to those who enjoy it.