I remember a story about an East End pub that was to celebrate it's centenary. All drinks would be offered for the day at the same price as when first opened, Beer was a penny a pint and shorts 3p.
The pub was packed on the day with happy imbibers. A stranger said to the Mine Host," Who are those two old boys sitting in the corner not drinking?"
The owner replies, "Oh they are a couple of our regulars from the Jewish community.They are waiting for Happy Hour"