Maybe he was just planning on leaving you with the check, Andrew. He orders another of the same for himself.

"Oh, I'm not above taking an odd job here and there, until I get properly settled." Things Underground are, after all, not wholly unfamiliar; people still find it advantageous to have an intimidating gentleman standing beside them, all the moreso when it's clear he's more than capable of defending their unsavoury interests. "Makes me a bit nostalgic, really. And the Welcome Centre is surprisingly helpful."