Las Vegas was presumably comparatively important to a jazz (or jazz adjacent pop) musician trying to get by during the lean years, equivalent to other drop-out-of-the-game contexts like the studios a few years earlier, or rock session musician work.
Nonetheless, it strikes me that very few musicians were able to pick up a jazz career around or after working in Las Vegas, and there were very few records that have emerged from their experience of playing in Las Vegas.
In the other contexts mentioned above, musicians collecting their paycheck seem to have fraternised and played together. There are occasional records and groups that emerged (Steps on the East Coast probably being the biggest one, but there were plenty of examples of LA musicians cutting records with studio colleagues).
But Vegas seems to have given rise to very little. You'd think that different casino's orchestras might have cut the occasional record playing jazz charts to show their firepower, or that there'd have been after hours jam sessions by frustrated horn section players. But overall, it just seems like a dead zone. Despite the fact that there were a number of well drilled groups playing there at one time it is hard to name even a single player who was part of the scene (although I have read a few Wikipedia entries that mention players ending up there).
Interested in forum members' views.