Ceasars or Leisureland both on the seafront mate, both have older machines. I live in the area but don't play there myself, to many local lads no how to play, the holiday camps are your best best bet, if your staying at a haven, your passes allow you into the clubhouses of all havens in the area, (wildduck/seashore/Hopton/Caister)
Bubbles in Hopton, is good too, if you like playing bullionbars/partytime/monopoly games etc.