To gain access to this tiny, secret cocktail bar in Venice, you'll either need to email for reservations or inquire with your server at Scopa Italian Roots, the restaurant Old Lightning is hidden behind. With just enough room for 25 people, this clandestine spot is like a mid-century bachelor pad with some Tiki decor and about two dozen variations on classic cocktails. Owners Steve Livigni and Pablo Moix have curated a collection of rare liquors from estate sales, global travels, and generous friends to create killer drinks that don't get caught up in fancy foams or infusions. The pair are happy to give you some history behind these liquors, most of which are whiskies, rums, and tequilas (and often no longer being made), and craft a customized cocktail for you. You'll need to dress up for the occasion (or at least avoid shorts and flip-flops) and forgo your phone at the door.