Bar Joke

Two spies walk into a bar. They are the only customers.
Bartender: What'll it be?
Double Agent #1 (motioning toward the far end of the bar): I'll have what he's having.
Bartender (calling to the opposite end of the bar): So, what's your pleasure?
Double Agent #2 (motioning back toward his nemesis): I'll have what he's having.

What should be the Bartender's last line?

Or, should the joke end after Double Agent #2?