Stewardess: What would you like to drink?
Guy in 23A: Beer.
Stewardess: Beer, or lager?
Guy in 23A: What’s the difference?
Stewardess: We have Heineken or Grolsch lager, and London Pride beer.

It would have been much better if the stewardess had asked “Ale or lager?” instead.  Though frankly, since they only had three kinds, I’m not sure why she didn’t just list them to start with.

Sigh…