Someone else seems to have had the same idea, although Charles has chosen tea as his beverage of choice (although he's not completely integrated with English behaviours, just incredibly particular about his coffee). He'd quickly learned that it wasn't a good idea to take breaks in his office, otherwise people kept interrupting him for odd tasks around the hospital. Having a telepath in the building was handy, and he didn't mind doing things outside his job description, but there was the emotional drain that came along with it. Especially in a place like this. He needs moments to himself like everyone else.

Upon opening the door, he falters for a moment. Someone else is here. Do they want to be left alone? He should have checked ahead.

"Ah, hello." Although relying on verbal cues also works.