We just grab food at whatever restaurant in near where we're currently posted. We're still in service while doing it though, which means sometimes we get interrupted while ordering, sometimes when eating, and sometimes after we're done. Gambling.
We talk about it, but not many of us get it, especially if you're working a convalescent service or at an in-town EMS station. On a side note about the meals, Murphy's Law of Nutrition states that "If there is one meal time per shift and you get only one call during that entire shift, the only meal will be interrupted by the only call". It never fails...