[Prefect complies, shifting his stare a few inches to the left, so now he's staring just over Kirks shoulder. Then he takes a drink, then goes back to staring. For a long time he says nothing. Then eventually he asks.]

Uh, did you have some kind of objective in asking me to drink with you?

[He is vaguely aware that this is not him at his most sociable, but the promised pants are not forthcoming and he wants to go work...]