There are definitely some girls in massage shops who will have fs for cash. I have been offered before but I only go there for a massage and happy ending. A lady in angel touch offered one time, this was a few years ago and same in Sakura. I didn’t take up the offer. They also asked me if I had condoms. Worth bringing some condoms with you and just asking. The massage shops have new girls all the time, eventually one will say yes. The worst that will happen is they’ll say no