I bus tables and hostess at an upscale diner. About a month into working there, during a regular weekday lunch shift, a family of three walked in and I sat them at a two-top (with an extra chair for the baby carrier) beside an empty four-top.
The mother pulled out two chairs from the table beside theirs and proceeded to change her filthy spawn right there. RIGHT THERE. In the corner of the goddamn dining area. I spent about fifteen minutes after they left just sanitizing the entire two tables and all the chairs.
People are super icky.