Right now - thankfully - only 1!!! I like to get a roll shot so i can process it. That said, that 1 roll is in my Mamiya RB67 and i desperately *need* to dig up some inspiration to finish off the 3 or 4 exposures on it....
Five, all loaded.
Canon EOS 300 with HP5
"" "" FP4
'' '' PanF
Spotmatic II HP5
Rollei B35 HP5
I can't remember the last time a film was in a body for more than 2 weeks before it was finished, so it should be ok.
An Olympus rc with panatomic x, a canon vt with fp4+, and a canon Demi s that seems to always be loaded with trix or tmax400 (this one takes forever to shoot with 72exp a roll). Only my cameras I don't use often have film loaded in them. I like to finish the rolls at the end of the day/night when possible.
A Kowa SixMM with some Portra 400 and a Pentax KX with Fuji Pro 160S. I've had a roll of re-spooled Acros in the fridge for a while now, I'm thinking of taking it out soon and loading up the Kodak Reflex II.