We don't have a table in our flat at the moment, its a nightmare! Not because of lack of space, just because I always find something more exciting to blow £300+ on.
I think you could get 4 people around a 90cm table but it would be pretty tight. Id agree with knighty that some kind of foldy option would be a better call, as you say though, finding a nice one is tricky and/or expensive.
Something like
this from Habitat would work, although not as sexy as the glass number you posted.