Three Piece Pan

i took 3 pics tuesday morning to capture a moment when homer's was completely full of customers. it was 9:30am, and i was working with kelly. i pasted these 3 pics together to show this rough pan-like image. there is a 3 letter acronym that is used in crossword puzzles for a situation like this: a time when a business has no more seating available. do you know what it is?
A) BTO
B) SRO
C) PDQ
if you know the answer, you'll get double punches toward a free drink today! good luck! the answer to monday's trivia is office space.