Da Mirco Osteria carries a list of stylish Italian aperitivi — vermouth, prosecco, Campari, aperol — the class of libation that presumes your shiny Vespa is still cooling at the kerbside but we are horny-handed Gaels of infinitely more primal inclinations and today's pre-prandial guzzle turns out to be fine stout from The Bridge Bar, two doors down.