A former public convenience near Tower Bridge has been converted into a subterranean drinking den with an art-deco look of chequered floor tiles and marquetry panelling that pays homage to the golden era of cocktail making. With most sips pegged at £9.50, you’d expect a decent drink and you won’t be disappointed: Sage of Consent, for example, packs enough punch for a rumble in the jungle with its blend of butter-washed rum, sage, citrusy bergamot, lemon juice and dark cane sugar. Alternatively, if you’re looking for something lighter, there are some cheaper aperitifs and spritzers – try the aptly named South of the River (sloe gin, lemon, sugar and Prosecco) or the more serious Chrysanthemum with its mix of absinthe, Bénédictine and Lillet Blanc. BAC is open until 2am, which sounds like a good excuse to use to use the night tube – even though the nearest station is a 15-mInute walk away.