Atlantis admission/ day passes

I also wanted to ask do you have to buy special day passes or tour passes for admittance into Atlantis night club and or casino, the marine exhibit and the entire Atlantis hotel shops? I'm staying on the island but not the resort in February and I can't add on any tours in Atlantis because the prices aren't posted yet. I'm worried I may not be able to get in.

Thank you so much!