I've often had "break for pizza and similar from 4-5 on fridays and then go back to work" as a pattern (I tend to get in at 11, so I'm not leaving at 5 anyway).

I've often had "break for pizza and similar from 4-5 on fridays and then go back to work" as a pattern (I tend to get in at 11, so I'm not leaving at 5 anyway). Some chaotic interaction with co-workers tends to be a good thing.