Friends of mine in Astoria, Queens have about 10 of these chairs for when they have comany. Because they stack up so well, it makes them easy to keep them in one corner of their kitchen (granted the kitchen then looks very bachelor-padesque and includes a bike rack, tools, and a dartboard). I just thought these chairs re-invented were kind of fun to look at.
1969 "selene" chair, the 1st all plastic chair in history, by Vico Magistretti[From Designboom]
Oh, and this too. Via the Mid Century Modernist, St Bartholomew's Church