Hello everyone,
thank you very much for sharing your experience. This gives me a new idea about a day at the Atlantis. I thought, we (hubby and me) take taxi and pay the entrance fee. Now I wonder if this doesn't work?
I found this about the entrance fee:
By purchasing the Discover Atlantis Tour wristband, visitors can explore The Dig and its exhibits as well as the Ruins, Predator and Water’s Edge Lagoons.
TICKETS
Discover Atlantis Tour wristbands can be purchased at the Temple of the Moon in the Atlantis casino.
Adults - $35, Children 4-12 years - $25
So, what do you mean? If I don't need the room, but take the taxi (4 $ + 35$ for ticket pp) + the ticket, can I go everywhere in the Atlantis, like beach and pools?
Thank you very much in advance for your information. 
May be I got the point now: The Comfort Inn makes sense if your are 4 people - same price + room? Is it that? Thanks again.