When I was @ the REC we had those standard issue red desk chairs. There was one keyer who was built like a linebacker (& she wasn't even one of those 'pretty fat girls'). She broke several chairs, and then several other larger people were complaining about the chairs being too small = it seemed they have a max weight limit of 200 lbs.

Mgmt ordered Big chairs. The linebacker refused to use it because she said she wasn't over 200 lbs (and yes, she kept breaking chairs).