This. Thinking and problem solving is a social process, the human brain is designed to be fueled via lots of nuggets of social. Theres a huge amount of variability in what sorts of socialization different folks need and what form it needs to take, but it's absence creates a terrifying inability to think clearly and execute.

Foam earplugs plus around the ear headphones solve most hearing other people distractions. :)

Point being, if my group is in YC this summer, we're definitely looking for a social living space