The Teen Beach Movie Summer Jam may be however, however with a small cheat you can still access three of the four special party rooms! I do not know if you can still obtain the items so do this at your own risk as there is a chance of a ban. Entering the room won’t get you banned though, so don’t worry. It’s also worth noting that the Operation Blackout music is playing in the rooms – ignore that.
To go to Big Momma’s log in to Club Penguin with this link. You’ll start out in this room.
You can go backstage from Big Momma’s or start out in the room with this link.
And finally, while the Highway doesn’t work, you can go to the Surfing room with this link.
Enjoy it while it lasts!