Pattaya Massage Parlors are all over the city just about in any street or alley.
'Adult' Massage parlors don't advertise the manual happy end with much more than sometimes advertising it as a body or physical massage. I have seen signs like "1 hour happy hands massage" and it seems obvious what that means in Pattaya.
These massages usually cost 300-600 Baht for 1-2 hours and the happy end is oftentimes included in the price. You may have to ask for your happy ending though and maybe give a tip for the optional "extra".
Pattaya massage parlors of the above mentioned adult nature are really just about anywhere in Pattaya and the best you can do is to just walk around the Streets (Sois.)
There are many Pattaya massage parlors in the Sois or alleys from Beach Road to 2nd Road, up to Soi Buakaow and further on to 3rd Road. Some of these Massage parlors disappear just as fast as they opened. Usually there are several girls sitting in front of the massage parlor.
If the girls call you by your favorite title (Sexy Man), you can be assured you have come to the right place. Sometimes this may be emphasized with a hug or arm pulling, in which case you can be dead sure.