Thanks folks!
It will be two nice looking thermal carafes going forward.
At the start of the day, I brew up a pot to take upstairs an hour before breakfast time (they chose time) It goes into a large airpot, so they can just wake up and get that first cup (or 4) before they come down to breakfast. Normally, while they're on their fruit salads, I grind and brew another small pot, which is poured fresh into their cups when the main course is served. No coffee hangs around more than 10 min. on the warmer.
I haven't had any decaf people in ages, then generally both in a couple preferred it. This particular week I've had to be pretty quick on the draw with brewing and refilling my one small thermal carafe! Its clear I need two, now to find two that I can stand the look of, and actually keep the coffee hot!.