Surely you mean that the flat is for sleeping not living. They're too small for living, because all the living is done at the restaurants, bars, parks, theatres

Surely you mean that the flat is for sleeping not living. They're too small for living, because all the living is done at the restaurants, bars, parks, theatres, offices and so on. If that's the style you prefer, then you need a co-working space to replace the office, in the same way your place probably isn't big enough to entertain people for dinner so you use a restaurant. And it's too dense with the neighbours to throw a proper party with dancing, so you use the bars and clubs. At least this is my understanding from having done a bit of both.