Please explain waht? That a discussion of a smoking ban has nothing to do with your question? which was :
Suppose there is a "private club" where men go and women rub their naked bodies on them. Should the township be powerless to prevent this?
That is a use and/or zoning issue that has to do with the license of the business prior to it's opening. The instance being discussed here has nothing to do with use/zoning in regard to the business opening.
In your scenario if the establishment was granted such a use/zoning license, then the township has no business going in after the fact unless it is causing a public nuisance. If such an establishment seeks a permit to engage in such a business and the community does not wish it, then they can work to prohibit it.
But that is not the case in this situation, thus apples and oranges.
So, a city should be powerless to change the zoning to prevent topless dancing in a private club? Unless they are creating a nuisance. Here in Texas we do that all the time.