Licensed massage spas will have the license of the masseuse postrd usually in the receptionist area so it is visible to DOB....this is important for another reason the fee.
Typically it is a set fee not a house fee, and $70 is about right for a legit place, so if they are actually a Body Rub place , they ate ripping you off ....so its up to them how much they want to charge , but 70 is a bit mu h for a walk- in body rub place since the real money will be made on extras