I'll cook in the morning and evening, when camping, but otherwise I've only ever got the cookery kit out when we've been doing a non-FNRttC night ride, like the Dun Run, or the Solstice WARTY. Even when we did the Definitely Not A Christmas Friday Night Ride to Bognor, we stopped at services for 3amses, rather than carrying cookery kit, and using that.
For the Solstice WARTY, the route was pretty much devoid of civilisation, so stopping anywhere wasn't an option, and for the Dun Run it was easier, and possibly faster to brew up coffee myself!