Just make the noise and brazen it out! They're probably wishing it was them anyway!
they would probably get envious and wished it was them
also it would probably turn them on and then they would'nt hear you for the noise they were making or may ask to join you
we had an embarassing moment but not in a hotel, it was in a lonley cove in cornwall ,we knew we were alone and so mrs evans could make as much noise as she liked,
just as we were getting ourselves tidied up, a couple from the other side of a huge rock appeared and said that hearing us turned them on and they also made love though rather more quietly than us .
we became friends for the rest of the holiday but not as swingers
needless to say that wasa the last time we did it outdoors
I have found that loud moaning , groaning and screaming is a guaranteed way of getting the people in the next hotel room to
a) turn their tv down to a reasonable level , indeed often off
and
b)stop arguing
works every time!!!