Tea at the theatre, 1948

I've never heard of this and haven't been able find any other mention -- apparently serving at least a small meal in a theatre is by no means a new idea. From an actress in the 1948 British novel by Angela Thirkell Love Among the Ruins:

...[That particular plotline featuring a day in a cheerful family's life] would do nicely for [live theatre] matinees with lots of women eating tea off trays, but absolutely no use, my dear, for my and Aubrey's sophisticated public.

Dinner theater became popular in the 1950s in the USA, very soon after this British mention, according to https://www.foodservicenews.net/October-2015/Culinary-Curiosities-Whats-the-History-of-Dinner-Theater/ . The historical mention in the LA Times at https://www.latimes.com/archives/la-xpm-2011-jan-07-la-et-dinner-theater-side-20110107-story.html perhaps explains Ms. Thirkell's actress looking down on dinner theatre: "Theater historian Ken Bloom has a scathing view: 'Most dinner theater has been theater at its lowest-common denominator. At the small places, it could be bad ham on stage meets bad ham at the buffet table.'”