Downstairs at the Everyman?
Spent my student days in there...also talking utter bollocks
Back in the 70s they had an elderly (seemed elderly to us in our cords, distressed tweed jackets and Charles Manson beard and hair combo) uniformed commissionaire who would, for a small consideration, supply you with a takeaway bottle of cheap wine without having the inconvenience of actually going in and having something to eat.
It was the first bohemian venue in the City, as far as we were concerned, until Keith's opened in Lark Lane.