There was a time when massage parlors were getting shut down all the time. The solution was to put the girls next to a hotel--sort of like bars do. Purple Rain is such an MP.
The line-up is OK. Prices are much higher than in the bars. (The house wants $40.00 for the room and the girls get $80-$120. Sessions go a full hour.)
Be careful in this area. It's dark and filled with problems. This is one area where I fear the cops. (There are lots of drug dealers and users nearby, and you run the risk of being set up.) Although it's only a couple of blocks from the Zona, take a cab--especially at night.
Cab driver like this place as they get a higher than average comission for taking clients there. IMHO it's not worth the risk and higher prices.