I personally prefer early sessions. Girls have fresh pussies and good attitudes. I find Sundays the best day and most spas are slow. Also, early afternoons Mon-Thurs (1-3 p.m.) are good at most spas. I avoid evening sessions, Friday afternoons, and all day on Saturdays. I almost never schedule an appointment. Check reviews and hit the spa soon after as there is rapid changeover at many spas. At Korean spas, the girls usually stay at least 3-4 weeks before taking "vacation". The Chinese girls can be very short term, and often take off a day or two at some time during the week. You can always call to find out who is in the house. With the explosion of new spas, there are many options for the girls. If they go to a spa, and business is slow, or they are not making money, they will move on quickly. And I always try to make "friends" with the mamasan. Many girls stay in touch with the mamasan and she will often know where a particular girl may have gone or whether she will return, and she will tell you the best times to visit the spa when they are not too busy.