It has been about 7 years since I was in Osaka. I am not familiar enough with the CFS style activities, but there is (or was) a bar called Physique which catered to the gaisen crowd.....the japanese who like foreigners. You could often meet people there. There was also a disco nearby named Explosion (same building, I believe) where many foreigners meet up with the japanese.
I have used the host club,
http://www.sanbanboy.com You can email and set up an appointment. Lists of boys, options, and prices are on their page, but in japanese.