I think all of the quiet pools are open 24 hours, provided you are quiet. I know CBR and POR have quiet pools. POFQ does not, but I don't know about CSR. I'm not sure if anyone would actually kick you out of the main pools after hours. I know that people do continue using them late after the lifeguards have left (but they do close off the slides). I just don't know if there's a time after which the CMs will tell you that you have to get out.