When we do video chats, the folks in Philly call in just like they were on a home computer. They don't all get together in a big room and call in. We also make a point to run all of our conversations through group chat and project management software. And plenty of the Philly folks work from home regularly as well. Remote work isn't simply tolerated, it's put first.
The remote folks (myself included) miss out on some of the office benefits like family-style lunches and get togethers, but we all make regular trips there and get to partake. It's not purely about location either since we're spread across numerous time zones. It just takes more deliberate communication.
There's always going to be water cooler chats, but those can just as easily happen via email where nobody would see them. We have to make a point to capture and share things to the right people.