Quick look in Cook and Morton dates Happy Time at 1962. So it WAS Victor who brought "For Dancers Only" into the modern piano repertoire. I'm not too surprised, as there are other signs that he knew his pre-war jazz - Ellington and Fats Waller tunes in his repertoire, plus extensive big band experience, stretching right back to his days as a child prodigy drummer!
That's correct. According to Lord, the only modern jazz versions of the tune from before 1961, when Vic Feldman recorded it, were by Johnny Griffin in 1953, Babs Gonzales also in 1953, Bill Perkins in 1956 and Art Van Damme in 1958 (does an accordion count? ). There's also an undated French session, which appears before the Feldman, by Pierre Gossez, featuring Georges Arvanitas on piano.
But not very many pianists have recorded it subsequently. Lord lists only Mance and the Three Sounds. Most recordings, including recent ones such as J J Johnson's, have been by big bands. I think that's a pity, because it's a damn good number.
Oh, and I found that I also have a version by Clark Terry
MG