We soon learned to call the steam baths "steam and creams" heheh.
I do remember one just outside the main gate at Tan Son Nhut (Saigon) Air Base was called "Magic Fingers" and for 200 Piasters, plus maybe a 200 Piaster tip, you got taken care of which would probably be called a "happy ending" by most.
Darned few of the airfields didn't have their local version of a steam bath/massage parlor. One at Cam Ranh Bay had all of its inside doors removed though, the base commander at the time didn't want any "funny business" going on in there.
At Nha Trang, they had a house of ill repute we nicknamed the Bowling Alley for some unknow reason... I guess so we could joke about going to the Bowling Alley and those who knew, they knew what was going on. Anyway, I was visiting there one night and had a scarey event. The Bowling Alley was a large open building with sheets as dividers to separate the beds and the girls used to laugh and sometimes carry on conversations as we did our thing. All of a sudden it got very quiet after a few quick comments in Vietnamese and my girl softly put her hand over my mouth and motioned for me to be quiet. After a few seconds she whispered in my ear that several Viet Cong had entered with their AK-47s but were only there for the same thing the rest of us were and not to worry. That scared the crap out of me since I was unarmed but I trusted her and nothing happened. It turns out the VC also considered Nha Trang their R&R center too and we had an uneasy truce with them for at least a year. If we didn't go after them in the city of Nha Trang, they didn't rocket or mortar the base. At least that's how it was explained to me.
I had some interesting times in RVN, that is for sure!