Three organists on the Quebec date are Edgar Swanston, Sir Charles Thompson, and Earl Van Dyke. Swanston was an unknown to me, but research shows him to be a Harlem native. Sir Charles had long been a fixture in Harlem, and Van Dyke was a Detroiter who went on to become a Motown stalwart.
So...roller rink or church? Like that man says, do the math!
Ask Junior!
Ballpark!!!