In Vegas the Chicken Ranch and Sheri's are right next door to each other. Sheri's has more women working, and typically hotter women, and higher prices. Last time I went the lineup had over 20 women during the afternoon. Chicken Ranch had about 12. At one time there was two others Love Ranch South and Alien Cathouse. LR South is closed, not sure about Alien Cathouse. If Alien Cathouse is still open you might want to try there too.
As for BBBJ, the women will tell you repeatedly that there is no "unsafe sex", including oral, with means a CBJ and Latex cover for DATY. Many don't follow this rule strictly, except for CFS, of the 20 women I saw from 2004 to 2010, 8 gave me a BBBJ, and 1 CIM. The one exception to BBFS was one porn star, who I chatted with for months before our meetup on her personal email.
Of all the brothels I visited more than once only 3 the Bunny Ranch, Chicken Ranch and Sheri's did I never get a BBBJ, all the others I have gotten at least one BBBJ. I only had one require a cover for DATY, every other one I ate them out fully uncovered.
Never bring up any "non-safe" sex in negotiations or in the room. They will listen in to negotiations, and the first few minutes of her room. If you push too hard, they will throw you out. When I did get BBBJ, all hinted at it in various ways. From licking me during dick check, getting the condom out and shaking her head no while asking if I am ready for oral, to just starting without asking.