IMHO there are no good massage shop with fun in Pattaya (at list I didn't find any in 17 years), but there are few good masseurs in these shops, so it always was like hit and miss.
Me personally prefer visit gay massage shops for fun and Blind massage Institute for massage. Be warned: they almost never have slots "right now" or "today", and often have only early morning slots "tomorrow", so to create appointment in advance is smart decision.
During my latest visit to SE Asia month ago I found what every Thai massage shop for males lose competition to Vietnamese massage shops in cleanness, comfort, interior, masseurs attitude and willing to serve, length of massage (in VN they never cut time and putting timer on phone in front of you, do not counting time of shower before and after as a time of massage).