Photo: Another Believer, CC BY-SA 3.0 (Wikimedia Commons)Up a discreet staircase on Maple Tree Square, The Diamond is a stylish Gastown cocktail bar with big windows over the historic square and a menu of expertly made classics and originals. The vibe is grown-up but relaxed, and the small plates are good. It fills quickly at weekends. Grab a window seat for the view over Gastown, and let the bartenders steer you if the list feels long.