The Bar/Lounge at Delfines Hotel & Convention Center
Delfines Hotel & Casino's bar/lounge is recommended by writers. Out of 4 reviews tracked on TripExpert, 2 recommended the bar/lounge, such as Oyster and DK Eyewitness.
Delfines Hotel & Convention Center 
Oyster
DK Eyewitness
Oyster "The most notable feature used to be the dolphin aquarium (delfines means dolphins in Spanish), but it no longer holds dolphins; the tank itself can still be viewed by patrons at Oceanus Restaurant, Oceanus Lounge, and Delphos Bistro"
DK Eyewitness "Guests can watch their underwater antics from the groovy Oceanus Lounge, or
above surface from the hotel lobby"
