As just one anecdote: many mediterranean cultures tend to eat one very large meal late in the day (~5pm) and almost nothing before that. I usually have little other than coffee and maybe a piece of fruit before 5pm. Consequently, lunch-at-work is not a thing for me.
I'm... so unaccountably bewildered and even offended at just the notion of it. I've never felt this way before.
I suddenly have so much new compassion for religious zealots.
edit: Ha, the anti-lunchers have come outta the woodwork here. Come on dudes, grow a sense of mirth. I'm mostly judging myself for intolerance here.