Mermaids and mermen are a surprisingly common sight at Dive Bar. Fin-clad entertainers spend their evenings elegantly swimming through the 7,500-gallon aquarium that hangs over the bar’s stone countertops, charming guests as the bartenders mix an array of classic and contemporary cocktails. Exposed brickwork, black-leather armchairs, and a dangling chandelier don’t necessarily continue the nautical theme, but they do contribute to the overwhelmingly luxuriant ambiance.

Live musicians grace the bar’s stage on Wednesdays, whereas Thursdays feature a dueling-piano show that brings to mind Billy Joel and Elton John’s legendary joust to the death. In addition to hosting DJ performances, the lounge pumps out dance-worthy tunes until as late as 2 a.m., even allowing customers to connect their iPods to the sound system and either play their favorite song or the shortest chapter from their favorite audiobook.