Bunker Bierhall

A friendly, sometimes lively, but not overly crowded or noisy basement bar located a few minutes from Covent Garden.

As well as having a reasonable pub-style menu, they serve beers made in their own microbrewery, which you can see behind glass at one end of the hall!

I've visited a few times and found it to be clean, with staff friendly and efficient. Much of the seating area consists of long wooden benches, which I'd imagine are well-suited to medium-sized groups.