I like the acrylic for its versatility. It works with modern or traditional decor and all colors.
Above: Acrylic Ballroom Chair $450 for two from Ruby Beets. These can be stacked.
Below: Acrylic Folding Chair $80.99 from Sears
Acrylic is certainly not the only good choice and the warmth of wood can't be overlooked. Below: Folding St. Germain ballroom chair from Ballard Designs $99 ea. Storage bags and seat pads are also available.
I would love to have any of these at my next party. How do you typically accommodate extra guests?