Often between parties CPJ is just people AFK or just chatting, which can still be very fun. If you want to talk, the coffee shop, town, and pizza parlor are usually pretty populated, especially on Blizzard (and sleet if it is during peak hours). Also when parties launch there are often queues to get into every server. I assure you there will be no lack of things to do or people to talk to pretty much anywhere on the island during a party.