Guilin has some saunas, KTVs and discos just like any Chinese city. Nothing exceptional. However, you will not find much that caters to westerners. You are more likely to be approached on the street by a girl trying to get you to visit one of the tourist attractions (she would receive a commission) than by a girl offering massage, FS etc. Likewise, Yangshua is a great place to visit, but not neccessarily for mongerers. What few girls are there on a permanent basis will try to rip you off.