Found a review on Tripadvisor that states they were able to go to CSS on a day pass?
Now I think everyone knows you can't always trust the information on TA but......

We were at a resort in Mexico and one afternoon the place was over ran with cruise passengers. What a mess! No clean towels, hard to get a drink, and lunch was out of the question.

Please tell me this was misinformation from TA,and CSS does not sell day passes to cruise passengers!

Vic & Sue