I don't believe ever in shared office spaces. Peter talks a little bit about this, every good startup is a cult. It's very hard to create a cult if you're sharing space with people.
Keith RaboisThe companies I have traditionally seen do best over the long term had lead investors for their seed rounds
Keith RaboisBuilding a company is basically taking all the irrational people you know... Putting them in one building and then living with them 12 hrs a day at least.
Keith Rabois