Get a day pass at a gay resort on Warm Sands and you can play away. There are no legit stand alone gay spas with "extras" in PS. MasseurFinder / Rent Masseur will give you options but not a "spa." COVID is coming back, so be safe. Provincetown is a mess after July 4th gatherings. SO MANY testing + for COVID that are double vaccinated. Santiago Hotel may have a massage room. La Dolce Vita is great, but nothing erotic allowed, which is good otherwise the hotel becomes sleezy. CCBC, Canyon Club may fit your needs, just very hit-n-miss on crowd.