By the time she's finished setting up, she's hot and sweaty again, even as the sun starts setting and the air cools.

That's fine. She gives everything a last once over, then opens the door to the Bar one more time, heading up to Bucky's room with a sense of relief to use his shower – and, more importantly the bathroom mirror and counter.

Maybe it's a ridiculous use of the Bar's time dilation effect, but, honestly, who hasn't wanted to have as much time as they needed to get ready for a date that's happening in... probably less than half an hour back home?