Chippy's Price is Right

From Frikipedia

Game based around the old Bruce Forsyth TV show and the rather avant garde approach to billing customers employed by chippys.

Essentially, the player simply needs to keep the last amount paid for his or her fish and chips in his or her head, and guess whether or not the price for the identical meal today will be "higher" or "lower".

Can be made into a competitive game if you tend to use a chippy as a social hangout. Though Frikipedia would advise against this.