I've considered some sort of drum box from time to time. I never knew there were user-operated devices like those mentioned in this thread.
I have a personal concern that makes me lean towards drum machine...I have an injured left leg that I'm not sure I can rely on. Regardless of that, I'd hate to have to keep my foot in the same place all night.
My perspective on drum machines...
I always played in a band with a drummer. None of the other musicians were playing the drums themselves either, and I don't think anyone credited their performances with a lack of authenticity as a result.
Should we not use loopers?
On the other hand (foot?), as keyboard player back then I always regarded sequencers as "cheating" and refused to use one.
And...although I rarely use one, I have no problems with Capos.
See what you've done...I'm having a moral delimma now.
Thanks bunches.