I always thought it contributed to the "seedyness" of Jabba's establishment. The concept of stripper slaves is frowned upon and has a negative emotional impact, which I believe was used to make the viewers feel animosity towards Jabba. Note, I specifically avoided a "it's realistic!" point here, My point is specifically related to how the movie conveys it's ideas to the audience, in a "show, don't tell" fashion.
but Jabba may have been doing that for the pleasure of Boba Fett.
Did he? If your not sure, than it seems to me that either the movie did a poor job of conveying this, or the movie did not intend to convey this at all. If it is the latter, than that cannot be the reason, since the movie is fiction and none of it took place (Jabba
cannot have "intentions" beyond what was shown on the screen and communicated to the viewers because Jabba does not exist). It's a pet peeve of mine that people try to justify things by hypothesising scenarios in fantasy beyond what the media was trying to communicate to the viewer, which can't justify anything since none of those hypothesis have any bearing on neither reality, nor the media.
EDIT: nevermind, that quite was edited out and as such I rescind my complaint.
I don't think being dressed in revealing clothing is inherently sexist, nor is it inherently "for the men". Although it can be sexist and used for that purpose, and probably more often than not is, I think this is an example of a stripperific outfit being used for non-sexy reasons.
Note, it has been a long time (many years) since I have seen the movies, so there is the very real possibility I missed something and am totally open to any counterpoints.