Punta Cana has some great areas to dive - a few shipwrecks and some caves. The nightlife is hit or miss, depending on which resort you choose. Bavaro has a better nightlife scene, in my opinion, and is pretty close to punta cana. That might be a good choice. Both places can be pretty touristy.
My absolute favorite place on the East coast is the
Punta Cana Beach Resort, because of their ecological research center and park. They have a PADI dive center on the premises, but the nightlife
there may not be what you call "jumping."
Buenas suerte!
