Yes, you can still join! To my knowledge, there is only one Facebook group for our cruise and it did close mid August, but a 'latecomers' list has been started! If you found the group that I listed, you'd click on the 'view pinned posts' button at the top, under the profile picture. That post has a link to an excel spreadsheet. Scroll down to group 3 and enter your stateroom info. If you need any help filling it out, Karen Ciolino, the page 'manager' is terrific and has been very helpful to me.
BTW, I did not see a message from you on fb, I am JanineAdamsKhalil if you still need help
I also found out too late about the fish extender groups and I'm so excited that I was still able to join! Good luck-hope to see you on the list!