Gay bars and nightclubs are sometimes segregated by sex. In some establishments, people who are perceived to be of the "wrong" sex (for example, a man attempting to enter a women's club) may be unwelcome or even barred from entry. This may be more common in specialty bars, such as gay male leather fetish or BDSM bars, or bars or clubs which have a strict dress code. It is also common in bars and clubs where sex on the premises is a primary focus of the establishment. On the other hand, gay bars are usually welcoming of transgender and cross-dressed people, and drag shows are a common feature in many gay bars, even men-only spaces. Some gay bars and clubs which have a predominantly male clientele, as well as some gay bathhouses and other sex clubs, may offer occasional women-only nights.