when we went to Release Yourself at pacha at the beginning of August we got a free drink with our ticket, we went up to the funky room as it is always quiet pretty early and we can get served quicker, there were 3 (extremly hot) women workin on the bar.
As usual we asked for our drinks then preceeded to hand over the ticket stub for a free drink, we got a total look of disgust and a plate with a bit paper on it which in huge letters said TIPS, they held back on putting our drinks on the bar until we had tipped.