Sadly, yes. A complete waste of time as an 'erotic escapade'. You get turned on more watching the "Whores on 7th Avenue" (Cadogan Street).
I took a fairly libidinous g/f to UGC Renfrew Street on a Saturday night. We spent the short journey home discussing the heroine's wardrobe.
If you have a monthly pass, well, OK (maybe). Pay real money? No.