He yawns his way down the stairs, ambles over to Bar, sits, and says, "I have a yearning for maple mead today."
"That door you just came through has the ability to selectively connect itself to any other door anywhere in any world, and once you come inside and close the door, time stops on the other side until you open it again. It's also individualized per patron. If I open it, I'll see my father's house. If you open it, you'll see wherever you were a minute ago."
The winged person takes a few steps farther into the bar - observes the stars exploding - "...okay, that's weird. How many worlds are there?"
"I have yet to find two the same, but I've only been here a week and I haven't been paying close attention."
"Tested it. Threw something out the door, closed it, read a book, opened the door, watched the ice cube hit the ground."
...The winged man duplicates this experiment. He doesn't read an entire book, but he seems convinced anyway.
"Nothing extremely time sensitive per se is currently going on on the other side of my door but if I stay here long enough to investigate the possibility of solving some problems with otherworldly intervention I would probably be gone long enough for my absence mid-thing-I-was-doing to be inexcusable."
"My apologies for forgetting to warn you about Bar. She's very friendly once you get to know her."
"All right." He picks himself up. ...He deliberates, then seems to decide that maybe the polite way to communicate with a napkin-dispensing bar is likewise with napkins. That or he just wants privacy. Bar seems happy enough to talk that way. It is not obvious how he is producing the napkins.
He sighs.
"No, as exceptional as the waffles are, it's more that I don't have anywhere better to be."