Trad’r Sam, the oldest continuously running tiki bar in the US, is (over)due for a little polish, and soon the Outer Richmond oasis could have a bright new neon sign to beckon patrons inside.

But what you may not have in your arsenal is a swizzle stick, which tiki bartenders rub between their hands to mix drinks. “Every home bar should have a swizzle stick for making Ti’ Punch and ...