I've never heard of anyone starting a company from a library. Was that something that was commonly done in the 90s (I'm assuming the Chicago office is that old

I've never heard of anyone starting a company from a library. Was that something that was commonly done in the 90s (I'm assuming the Chicago office is that old)? If you were starting again in 2012, would you pick a library over a hackerspace or a shared office type deal for any reason other than cost?