The Dragon Isles are extremely sharded, which is why you’re unlikely to run into any specific player there unless you join a group with someone you’re specifically going to RP with.
There have been a few server-wide RP events on the Dragon Isles, such as this one:
https://www.argentarchives.org/node/263431
I assume there’s guild RP, too. Personally, I’m accompanying the <Kirin Tor Intelligence> guild at Camp Antonidas. If you’re into mage themed RP, perhaps you could contact them!