The Oilman's Inn, on Boyuk Gala Street a few steps from the Maiden's Tower, is part curry house, part British pub, and a long-running fixture for the expat oil-and-gas community in Baku. The menu mixes Indian curries (the balti and tikka masala are reliable), British staples like fish and chips and pork chops, and a perfectly adequate set lunch.
The bar runs late and has a wide selection of beers, spirits, and wines, including more than the usual number of imports. Not the place to come for proper Azeri cooking, but a useful pressure-valve if you've been doing kebabs for a week.