Airline pilot here …
Do NOT try the two-guys-in-the-lav thing. Particularly if either of you is under 50 and have dark hair or a good tan.
You will be noticed by some passenger who will mention it to a flight attendant and the (silent) alarms will go off. The best outcome will be that you’ll be profoundly embarrassed in front of an audience of 100. The worst outcome is a day (or more) spent with those nice folks from the FBI & their Brave New PATRIOT Act.
A guy-and-gal in the lav might, just might, get away with it. But two guys is gonna get a rise out of some passenger and then we’re off to the races. Not that the crew is homophobic, rather that once alerted to anything security-related, we’ve gotta go to Red Alert. And the odds of a pax noticing you two is much higher than noticing a hetero couple. With heteros, the witness’es first thought is likely to be sex, followed by maybe something else. With two men, they’ll be thinking security first, sex later if at all.
Now for a lighter story from a lighter era.
Back in the mid 90’s I was flying a late night flight from a midwestern city to the east coast. We left around 930PM Central and would arrive about 1AM Eastern. We had maybe 30 pax on a plane with 140 seats, plus 3 male pilots flying and 4 female Flight Attendants (hereafter FA) working the cabin. It was a sleepy night for all concerned.
About halfway there the intercom rang. It was the aft cabin FA, reporting that she had a 30-ish couple who were pretty drunk when they got on board and they’d had one or two more & were now blotto. Not causing any trouble, but she wanted to make sure the other gals cut them off too.
So far, so normal. This happens probably every other flight to somebody, particularly late at night.
A few minutes later the FA reported they got up together & went into the same lav together. She (the FA) is sitting on her little seat near the rear galley & lavs, reading a magazine. The intercom banter got a bit, shall we say, salacious, at that point.
(In case you wondered, FAs are a jaundiced bunch, and raunchier than a gang of RNs at a convention. They get worse as they get older, and our crew was all 40+)
5 quiet minutes elapse and they emerge, a little rumpled and both looking angry / disappointed. This too is relayed to us up front with suitable snide comments from the 3 other FAs on the phone, plus us three driving. We’re starting to get into the game now.
They go back to their seats, a whole row only a couple of seats away from the FA. The nearest other passengers are three or four rows ahead of them.
Next we hear that they’ve gotten a blanket, placed it over him, and she’s disappeared partly under the blanket. Our intrepid on-scene reporter gives us the blow-by-blow description of the ensuing 10 minutes. Massive hilarity on the intercom. We’re lovin’ it. Anything to break the monotony.
Finally she reports they quit. Apparently he was drunk enough that he was so anesthetized that her best (quite vigorous) efforts were for naught. Oh well.
About then it’s time for us to get to work with descent and landing and all the rest. After we park all 3 of us immediately get out of the cockpit to say good-bye to all the passengers in general, and two (well, one actually) in particular. Funny, but the 3 forward FAs had the same idea. It was a vertiable honor guard of 6 smiling, good-byeing crewfolks as every else deplaned.
Naturally, as they were sitting way at the back, they’re the last ones off, with our intrepid reporter right behind them pointing madly to make sure we all knew who it was; not that we had a doubt in our minds.
She looked the part of a slightly drunk, slightly hung-over porn movie extra, minus the plastic enhancements. Mileage without much to show for it. He was a little smarmy, but otherwise ordinary. Probably managed a Denny’s. Both were natural type-casting at work.
We each gave them our best grins & our cheeriest goodbye’s, and suddenly she realized “Oh SH*T, they KNOW.” Her face was priceless. I can still see it.
They passed the last of us & stepped off the plane onto the jetway. Somebody giggled, and we all lost it. 7 guffawing, pointing, laughing, delirious folks as they hurriedly retreated up the jetway, with her starting what was doubtless a long rant about him embarassing her in public.
Ah, memories … Funny, that’s one of the 3 or 4 specific events I remember from flying the entire 1990s. Shows you how boring, or at least monotonous it can be.
Back to the OP & the present. Nowadays the story wold have taken a very different course the moment they disappeared into the lav together.
Don’t try it; the odds are poor and the reward slight. Do it in the elevator at the hotel instead.