I worked in a company with 2-3 person offices. And I think 2 persons was the best. You could stick two people together that needed to cooperate a lot anyway, or

I worked in a company with 2-3 person offices. And I think 2 persons was the best. You could stick two people together that needed to cooperate a lot anyway, or a senior with a (very) junior. We practically never needed meeting rooms, except for team/project meetings, because whenerver 2 -4 people needed to discuss something they just met up in one of their offices.