You can do it as a spur of the moment thing and don't need to contact anyone or make an appointment. If you don't particularly care for what you see you can always kick back with a drink and hope that the stage show will keep you entertained or tell yourself better talent just happens to be in the dressing room at the moment. I can cut my losses at $20 if a dancer is awful in the VIP whereas I commit at least $100 for what might be a shitty massage or $200 for a horrible SP. Sometimes I just want to ogle naked women for a half hour or so and without needing to get my rocks off. I can drop in the club at midnight or 1 AM whereas most parlours seem to close at around 9 PM and for the most part SPs that answer their phone in the wee hours of the morning and agree for an immediate booking aren't the type I'd want to see anyway... Don't forget the fun of going beyond SC limits, you know what you're going to get at an MP or with an SP, but being in flagrant violation of SC rules is always a pleasant surprise and not always more expensive than it would be elsewhere...