Wow, Gopher, playing piano at the Hall! That brings back memories.
Wouldn't it be ironic? The big rewrite to root out all the "immoral" influences from secular composers, only to have a delightful reference to one of the world's premier bisexuals?
I'm sorry to say I don't quite agree with the song comparison, though...
The similarities are obvious, but the chords are not a direct match and the melody - while in the same "swing" rhythm - only bears a resemblence. The development of the B portion of the verse in particular is similar in pattern but quite different in specifics.
Both are inspired by music hall forms that have a common root with turn of the century hymnals.
The song could possibly be regarded as a pastiche of Lazing, but in the absence of such intent or preexisting context it isn't likely that a lawsuit can be sustained.
As ingrained as some of the old tunes are in me, I didn't really enjoy performing them - as far as I can tell, the old songs were not transcribed for piano accompaniment but rather for vocal performance. At least they seemed to me to be written for SATB. I had lost interest in playing before the big songbook rewrite.
-Void (of the piano slave class)