The Rialto in Upper Parliament Street was a popular venue for ballroom dancing. If you wanted to dance on Sunday you had to join the Sunday Club.
Monday night was dancer's night and all the dance teachers and competiion dancers used to go there for practice.
There must have been a fairly strict dress code because all the men wore their lounge suits and the ladies looked resplendent in their evening gowns. A new manager came in about 1960 and the Rialto started to go down hill with riff raff being allowed in.