i mean, you must have to deal with ordinary things while deeply into a long creative endeavor.  People who like, want to go out to lunch, but you really are right in the middle of this very small but important detail that needs to be just right before you can even think about taking a break, and it could be hours.
i go to lunch alone. i don't do lunch meetings. i try to schedule meetings before or after lunch. also i should mention that i call every meal lunch. that's one of the joys of making your own lunch schedule