I think the other advantage is it totally separate any concept of "butts in chair hours". Nobody in a coworking space is going to quietly judge you if you leave

I think the other advantage is it totally separate any concept of "butts in chair hours". Nobody in a coworking space is going to quietly judge you if you leave at 1pm, which would be more of a concern at an on-site location. A co-working space gives you the option to have a social work space, but you get to choose each day (and even each hour) if that's what you want. I think they other advantage is in a commute. You have many more options about where you want to be co-working than you do about where your company's location is. If your company is across town from you residence, and you have an hour commute you could find a co-working space that is closer to home.