The Hiddens Rooms has lovely cocktails but some things let the venue down. When we went it was unbearably hot and humid so it really wasn't a pleasant place to spend a whole evening. There is also a £1.50 charge everytime you pay by card, which seems excessive. We were there for a special occassion and had booked an area, and when we arrived the staff seemed really put upon when we asked to be shown to our area. I think the target age group is the affulent 40ish set, the cocktails aren't cheap (starting at around £6.50) but were worth the money. The pros were that we didn't have to queue for long at the bar and the bar staff were efficient.