Generally if the dryer and the clothes in it are stone cold, this is a pretty good indication. If it’s obvious that they just barely stopped, (the dryer and/or room is still hot), then I just wait around. I always bring a book. If no one shows up for several minutes. I’ll place them on the folding tables, or baskets left by the manager for that purpose.
In my old apartment building, we had only 2 machines for 12 apartments. Four of the apartments were rented by “permanent” tenents. The other 8 were run by a “hospice” organization where sick people’s families stayed while their relatives were recovering in the hospital after being flown in from one of the villages, or the interior.
The four tenents were all quite considerate of each other. Not to mention, we knew each other’s laundry schedules. Way too frequently, the hospice guests were not. They’d decide they had to do 19 loads of laundry because their plane left the next day (they didn’t know that til the last day?), and tie up both sets of machines for an entire day, not to mention running them past the hours of operation (always pleasant to try and sleep with the not too distant thump of a pair of tennies in a dryer).
Frequently they’d put in loads of laundry and only THEN decide to hunt down quarters, so you’d bring your laundry down, find the washers filled with soap and clothes (so you couldn’t remove them, even if had been quite a few hours, unloess you wanted sticky soap all over you), but not running, and end up making several trips to the laundry room to see it they were finished yet, only to find that they hadn’t even managed to get them started.
I’d just as soon go to a laundromat, and get all the loads done at once and be done with it.
I don’t like folding my clothes and you expect me to fold yours?