Jim had rolled his eyes at the announcement of the rooms—not that he didn't like spending time with Juno, but it was typically immature of Them to pull some sitcom-grade nonsense like this in the hope of embarrassing them both. Luckily he felt like he could count on Juno not to add to that; she had a strong sense of privacy too, and wasn't going to have a laugh by pushing his boundaries. So it probably could've been worse.
He'd shed his jacket but not much else, and folded it up to take with him. We'll both just be polite. It'll be fine. "Yeah, let's go check it out," he said to Juno in resignation.