I don't know they are good for convenience, but one of the many reasons I have never been back to GFE is it just doesn't seem like good value compared to an indie. I haven't been back to Classic as the last punt was bad.
Well I used to go to GFE a lot, but haven't been for a few years. I think you tend to get less variation with parlours, the really great and really terrible punts are indis. In the era of UKP that means you could stick 100% to tried and tested but nobody ever does that.
I guess the big advantages of parlours is you get to see the girl first so none of this 10 year old photos or B&S crap, convenience of the place, clenliness, security - don't think you are likely to get mugged at a parlour.
I agree something like £70/hh is starting to make parlours a bad call, but £20 for any kind of shag with a girl you get to see beforehand has to have some kind of place in the market