Yes mate, i went up for a session on Saturday and was turned away after admitting i am not a student any more. However, it doesn't seem like they do any checks - i say that as i'd filled in the form and almost handed in my money when i saw a box i'd not completed that says Alumni, Alumni (1st year), Student, Staff and asked them what i should put as I was none of the above, at which point i got kicked out.
Before i went though i had a look in, the wall is in an old squash court (or something of that size) and whilst the construction of it looks really good - dark browny colour, four walls, matted all of the floor - theres a lack of much steep stuff and the holds are all massive and really incut - obviously it depends on your level, but if you're climbing v5 & 6 then i think you're better off spending your hard earned at the Foundry.
In addition its full of students climbing in trainers = grubby holds, 0% chance of hard stuff.
Clearly all this is my point of view and you really shouldn't take anyones word for it. Go, blag your way in - make of it what you will...