Recently I was lucky enough to visit a hotel where I was allocated a room with a connecting door. feeling really pleased with myself, I listened at the door and there was definitely a couple on the other side. "Yes!!", I thought. So I went off to get something to eat and find some entertainment until the action generally starts at around 10pm. Came back and they were watching a film. The language of the movie was German - not usually a good sign; French is a better indicator of an interesting night. Waited for it to end and, yes, it was very quiet but there was a distinct breathing pattern. They had started having sex. Unfortunately, they had twigged that the connecting door meant that somebody might hear them. "Oh the shame! Someone might hear us doing a perfectly natural activity!" Yes, they were really quiet and determined not to make a sound - I had to strain to hear anything at all. Hoping that eventually she'd 'crack' and get loud, I left a recorder by the door and went to bed.
I recovered the recorder and listened to the results. Hours of heavy breathing, coupled with intermittent snoring - mine! - and just a couple of soft, stifled moans from the next room. What a let-down!
The moral is: being in a room with a connecting door isn't always as great as we might hope.
I have had like zero luck with hotels, but back when I used to travel, god knows that I tried. I think your first mistake was going out and coming back. Never make a peep. Ideally the people around you will think your room is empty. Not only for keeping it seeming like the room is empty. To the point of unplugging the mini fridge and turning the HVAC unit off. If you gotta piss, sit and piss and don't flush til after showtime. Take yoru shoes off. Quiet as a church mouse is the ticket. A lot of people are shy.
Last time my husband and I had a connecting room was in San Francisco and all we got to hear was a couple fighting. It was really sad. Sometimes eavesdropping is fun by itself though so I still had a bit of entertainment listening to them fight, but after a while hearing her go on and on about money problems got really dull. So hubby and I had sex hoping to motivate them but no luck.
A quirky overheard item through a pass-through. The woman used "my Judy" which I had never heard before, as in "After this, my Judy is going to be out of commission for a while, if you know what I mean".
I have had several stays with ibterconnecting doors, actually a lot more than I expected. But never any luck. The last 2 times I didn't even bother wasting one of my recorders as I could just sense we were dealing with an old couple again. For some reason they always seem to pair me up with the grannies...
I just stayed in a Motel in which the doors faced each other (with a LARGE gap). My room was the only one to do this out of all of them. Unfortunately, a mother and her, what seemed like 8 children, were staying in that room. It gave me a good excuse to wander the halls "listening" to my headphones because they were so loud. No luck though
- and just a couple of soft, stifled moans from the next room. What a let-down! 
