Thanks again for your comments!
I think I'm going to make more use of my midi pedal again. I stupidly sold an 18-key pedal, because I thought it was too heavy, and bought a lightweight 12-key pedal.
@Bill: I have also played on midi pedal without shoes on gigs. These small midi pedals really invite to put off your shoes... But it's wise to wear black socks then

Those portable pedals don't let you do proper heel/toe playing. Kind of like the correct fingering we've talked about in other threads. Easier to move though.
Somewhere on the Internet is a guy who plays both feet on a Hammond barefoot. Doesn't look too good but I saw a clip of him doing "Squib Cakes" by Tower of Power. Look it up and listen to the bass, this guy can do it with his feet ! Even Chester Thompson who recorded the original goes to LH bass for his solo part where the real bass drops out.
_________________________
Bill in SC --- Roland BK9 (2) Roland BK7M, Roland PK5 Pedals, Roland FP90, Roland CM30 (2), JBL Eon Ones (2) JBL 610 Monitor, Behringer Sub, EV mics, Apple iPad (2) Behringer DJ mixer