The Oryx is a decent hotel but I wouldn't say its got the best bars or restaurants. For restaurants, Nobu has great wow value sitting on its own little Island looking back at the city. The foods great but it's pricey. Zengo on the 62nd floor of the Kemplinski is also good and has great views. Other hotels worth visiting for food and drink are the W and the Four Seasons. Fridays are brunch days with all major hotels, generally 12:30 to 4:30pm lots to eat and drink. Booze is expensive though.
The Souq is good as other have said and the Corniche is a nice walk. If you want to get out of town, you might fancy a four wheel drive tour into the dunes to the south or kayaking in the mangroves to the north if you like that sort of thing and you've got enough time.