This is a weird shaker power.
Glam scoots over to the counter behind which no one seems to be giving anyone any drinks, and watches as one mysteriously appears in front of one of the patrons.
And then a napkin, informing them of the end-of-the-universe-ness of this bar and a few other useful properties it has.
And Glam being Glam, having an excited discussion with the napkins will be the state they'll be found in for the next while.
A girl in the most artistically applied eyeshadow and reddest fuck-me lipstick ever - and a really expensive-looking dress which doesn't quite fit - walks in, looking over her shoulder, and only turns her head when the door has shut. She looks confused.
"Yup! So by whatever unfathomable processes apparently the door thinks you and I both are that. Since it picked me, it's probably at least somewhat well-calibrated, so you must be interesting too. And your first drink's free, by the way, but subsequent ones cost appropriate prices according to wherever you're from."
"This is Milliways, the bar at the end of the universe, anyone's guess which. The bar's sapient and if you talk to her she'll use napkins to reply. Your first drink's free and subsequent ones cost prices appropriate to wherever you're from. The door appears at random places to pick up random ineffably interesting people, and while you're here time will be paused wherever you're from. Oh, also, Ens, I forgot, there's translation magic going on here, we probably don't actually speak the same language. I probably forgot something but yeah."
"Mostly accurate," she says. "But they aren't at all fictional where I'm from. So at some point, someone decided that they needed a powerful champion to kill vampires and protect humanity, and for some reason they decided the champion should be a teenage girl, so now every time the previous Slayer dies a new teenage girl gets the superstrength and super combat skill and super upsetting prophetic dreams."