Why are third places so necessary in our lives?

"Great Good Places" author Ray Oldenburg says third places help unify neighborhoods, serve as "ports of entry" for newcomers, bring young and old citizens together, help care for neighborhoods, foster political debate, and even reduce the cost of living.

This week, we'll talk to Ray Oldenburg, city travel experts Ondine Cohane, Simone Rathle and Kristine Ziwica, and the people who run the The Rendezvous restaurant about "great good places."