Obviously you haven't checked the price list recently. 😂
And there is only one entrance: the elevator from the bay. And the service elevator for staff only. You are mistaken somehow. But here's the trick: people have to swim through this aquarium right? I have trained a few baby Goober fish to pickpocket everyone who enters. So drinks are on tabs only, free access to bank accounts to deduct it, and I charge a hell of an interest. 😈