As you might guess from the genteel name, Holborn Dining Room is a grand dame of a brasserie, with antique mirrors and tweed detailing on the red leather banquettes. It also happens to host London’s largest collection of gins. Now we’re talking. With 400 bottles of gin and 27 different tonics, knock yourself out with 14,035 gin and tonic combos. Then there’s the gin cocktails to try. It’s a must for any gin lover.