Ad campaign: Gentlemen's club

The client is a "gentlemen's club" in a large urban area that wants to attract new customers. We generally avoid accepting such clients, but in this case, the client wants a picture that is the antithesis of the typical advertisement of such establishments (usually semi-clad starlets). They assure us that they run a very classy place and want to attract a classy clientele. So, the challenge is to come up with a tasteful image that will attract gentlemen of a certain demeanor. The picture will likely appear on billboards, so it must be acceptable to the community at large.