I suspect "everyone" is a bit missleading, another bit of reserch for folks particularly in the south. Prohibition didn't end in some areas until long after this group's cutoff so knowing what areas could or could not have the traffic is another subject to research.
Mark is right. Prohibition was repealed as a national law, but states were permitted to continue restrictive laws for that state, including county option laws,
Tony Thompson Editor, Signature Press, Berkeley, CA