I've been to WGS several times. The locker room is nice, and so is the shower and spa, so long as you don't mind the openness of it all. This is not the place to go if you don't want to see or even be aware of other guys. The locker and shower are big open rooms.
The girls are hit-and-miss. I've had very sensual and fullfilling HJs, and I've had girls use their skills and know-how to make it as quick as possible. Roaming is always OTC, but again YMMV; some girls enjoy and encourage it, and some don't.
@biggeorge: abrak is right. There's a second floor place on the corner of 7th and 30th which is either legit or very run-of-the-mill. WGS is up towards 8th, with a marble facade you can't miss and a first-floor entrance. Inside they occupy the basement and first two floors. I think there might be another place in the same building above WGS, accessed through a different entrance.
One more thing: WGS is HJ-only; absolutely no extras, and no negotiating. It's a good spot for a newbie; once you find your way into the table shower room, they take the lead and all you have to do is be nice and you get everything that's available. It's $100 at the door on the way out, tip at the same time in the girl's pouch. The typical tip is $30 though I've gone to $40 for girls that take their time and get into it. A bit expensive for what it is, but I value the shower before and after, the clean surroundings, and the flat rate no-negotiation service.