There are a total of 6 hot tubs at Y&B and BCV, one at each quiet pool (3) and 3 at SAB. (this is one of the many things I love about Y&BC).
I know there are 3 at WL (2 at main pool, and one at VWL, that non
DVC guest can also enjoy.) The whole week we were at VWL the DVC hot tub was closed, with no aparent reason. Didn't stop to ask why. (I was pregnant and not really supost to go in it much anyway, and it was warm.)
I have not been to every pool at OKW, so I don't know, same with BW, but CarolMN, said there was.
SSR has one at the main pool, I don't know if the other pools would have one too, but it aprears to be the trend that every pool has one.
Vero beach has one, and one pool. Don't know about HH.