The freaky tiki bar Trad’r Sam is by all accounts the oldest continuously operating tiki bar in SF, but it’s currently “closed until further notice,” and court records show a hurricane of a legal battle is underway for control of the establishment.Long before there was a Tonga Room at the Fairmont Hotel, the Richmond District tiki bar Trad’r Sam was putting paper umbrellas and excessive garnish on their Polynesian-themed cocktails, starting in 1…