The band leader that I played with for 20 years until his death used to write a lot of medleys and I would have to modulate between the various songs in the medley. One of the modulations he used to use he called the "We want Cantor" modulation. I guess it had something to do with Eddie Cantor. I'm too young to remember him but it was a four bar modulation. It went like this way in the key of C:

Old key - C
C Am Dm G7
New Key - F (no chuckles here)
F Dm Gm7 C7

On this modulation I would sometimes substitute a Eb9 for the Am.

Tom