Green’s Dictionary of Slang

(US black) a time of day when young people meet to chat and enjoy themselves.

1953

L. Durst Jives of Dr. Hepcat (1989) 1: At a certain time a group of youngsters gather around the corner drugstore to meet their dates, have sodas, dance and generally pass the time away. ‘It’s “swoon time” on the stem and the gone cats are cruising on down to get with their woo numbers and cut a few rugs and make with the malts.’.