I don't want to be working longer hours, or make work a larger part of my life. I don't particularly care if I have "real" friendships with my colleagues outside of work. I have plenty of friends and family that I already have trouble juggling.
What I want is the camaraderie, greater trust, mentorship, professional networks, etc. that comes from working with people during the day in a shared space.
I'm not sitting with a church community or sports team during my 9-5. I've had a couple co-working memberships during the last couple years - most people just go there to sit and work quietly. Maybe you make some small talk here and there. Except for the people working with their colleagues who are also in the co-working space.