A blind Farang could find a massage place in Pattaya! You can even get a massage by blind men too! http://www.paradise-pattaya.com/pattaya-massage.html
Here is one place.
http://www.pattayaphotoguide.com/sabai-dee-body-massage
And a few others:
http://www.thai-anxiety.com/massage.asp
The fancier the place the more you pay. You can walk on Pattaya 2nd Road and pass lots of little places, many with signs held up by the "workers" advertising their prices. Figure on around 200 baht to 300 baht per hour for a massage in one of these places. You pay for any extras. Besides the store front massage parlors you will also find some in malls. Your hotel may or may not have a massage parlor depending on its size and expense but they all can get someone to show up with a telephone call.
Or are you looking for some sort of specialty service like a ............
http://www.mypattaya.com/132soapymassageparlours.asp
May is okay, some think that December is better, but for Pattaya May is okay. It will be a little hot at times but drink extra water, walk on the side of the street where it is shady. Stop in an air conditioned store, mall or restaurant for a while to cool off. Near the end of May a slight chance of rain but for Pattaya rain rarely lasts more than an hour or so. Best thing about May is that hotels are at Low Season pricing!
How much do you want to spend on a hotel. Knowing how much you want to spend on a room will narrow down the suggestions you get. Use a baht figure.
Do you want to stay in Pattaya City, Jomtien area or Naklua area? Jomtien and Naklua you can also swim at a beach. But some places are not convenient for getting to the more popular Pattaya City area where you can walk to the nightlife, malls, restaurants, street vendors, etc. In the Pattaya City area local transportation is only 10 baht!
My preference is a hotel on or near Pattaya 2nd Road, Pattaya City area. Marriott, Siam Bay View, Fairtex, Hard Rock Hotel are some. Unless you want something cheaper.
Up to you.