Historical version 3 of BRB (view current version)
BRB A.K.A. Bar Room Bar
This is a chain pub with other branches in Vauxhall, [Kennington]?, Islington, Soho (I think) and probably others.
The Camberwell branch does nice, wood-fired pizzas but could be considered possibly too "modern" for some.
Their range of beers is fairly limited, but if you don't mind more mainstream brands, you'll be ok.