Eating and drinking in the area is thoroughly discouraged.
London Bridge has stacks of decent boozers, though. Market Porter for real ale fans (bear in mind it'll be full of foodies buying frisée lettuce and four different types of radiccio as well 'cos Borough Market's on), Old King's Head, The Globe or Southwark Tavern for more standard fare. There's a few others a bit further afield that I'm gonna keep to myself if you don't mind. Don't want you 'erberts ruining it for me!