Galleries at Gate Village
Gate Village, Dubai International Finance Centre
The village surrounding the DIFC's Arc de Triomphe lookalike, the gate, is also home to some of the city's best galleries. You'll find the classic upscale operations here (Christie's, for example, has their office in this area) as well as some local galleries that are more than worth touring, like Ayyam Gallery (they also have a location in Beirut). You can cover all the art spaces an hour or so, but check the calendar for their art nights, which bring live music and performance to the space in the evenings.