Even more plastic chairs
Cleared up at the end of the evening

 
Plastic chairs are just as ubiquitous as containers so quite a few were caught over a somewhat longer period without intentionally collecting them. The variation in design is dizzying but they all have cut-outs in the back to make them stackable. For more chairs see also Found Object 24..28 in Archives.

 
 
 
 
Artificial coloring by Billy Axeman.