The show time was the lunch time.

There was no strict distinction between the stage and the seats. If the theatre had a capacity audience, the audience went up onto the stage. Theatre-going was of course the best luxury for ordinary people then, and the joy of eating went along with that of seeing plays.
'Ka, Be, Su'; Kashi (sweets), Bento (a packed lunch), and Sushi, were the typical foods in a theatre.