Nineteenth Century neon

The service in Rules is staunchly French, as it should be in any fine dining establishment. 

Very much an 'English' restaurant, I took my uncle and aunt to dinner there ten or so years ago on one of their rare trips to London.

The beautiful brass plates outside the entrance have been there for over 200 years and were designed to reflect the sunlight. Twinkling in an array of colours, they in turn attracted passing ladies and gentlemen.

It was the door man who described them as old fashioned neon.

Looking at the old fashioned terms (I haven't been out to luncheon in nearly half a century) I decided to look up the definition of supper and had to laugh.

supper
ˈsʌpə/
noun

an evening meal, typically a light or informal one.
"we had a delicious cold supper"
synonyms:
dinner, evening meal, main meal; More

SCOTTISHNORTHERN ENGLISH

a meal consisting of the specified food with chips.

"a fish supper"