Are you staying on Paradise Island? At one of the other nearby hotels like Comfort Suites or the Best Western? The reason I ask is that both of those - and probably several others - have an arrangement so that their guests get use of some of the Atlantis facilities. If one of them is either of these two programs, you might like this instead: Snorkel the Ruins of Atlantis During Your Caribbean Vacation
I don't know what the specific designation of "resort guest" is but it might be worth trying to find out. If you're staying at a Cable Beach resort , I don't think it applies.
Lopez116 has much more recent experience than I do. I haven't dove with BD in many years. Bahama Divers gets a lot of the Atlantis traffic that doesn't want to ride 45mins. to Cove's since they're just across the bridge from Paradise Island.
And yet one more dive/snorkel option (last one that's both afaik): Services | Explore Scuba Bahamas is the only dive operator located right on Paradise Island
Also a snorkel only operation is: Snorkeling | Seahorse Sailing Adventures - but doesn't even seem legal on a 65' catamaran...even spread over all 3 of their boats it must be crowded.
We are staying at the Colonial Hilton in Nassau. I've looked at their website, sent them an e-mail, but never got a response back from them about what they offer. After some serious searching on their website, I found where they have a "dive package", but I'm not doing scuba and it looks like that's what that one is all about.
I'm not overly interested in a long boat ride (I get to have those courtesy of my employer and one of our clients).