@zebratron2084 There was the time I sat in the nice quiet room in the Espresso Vivace on Broadway and started grooving on soft but energetic music on my headphones and digging into some proofreading work... and ten minutes in, a couple guys decided the table in the middle was a conference table.
The temptation was to spend as much time as it took sucking loudly on the remnant of a nice, thick latte into which excess ice was slowly melting. I coulda got a good, annoying fifteen minutes at least.