Correct as Wozza2404 says no lounge access for Gold or Diamonds at Waldorf Dubai, however they do give free breakfast for 2 persons to Diamonds in the main restaurant.
Waldorf in my opinion is by far the most luxurious of the Hiltons in Dubai ans also has the best service but you will be a bit of a prisoner here as it is right round the far end of the palm.
If you want chill time Waldorf would be my choice also no fighting for sunbeds with ample on its private beach.

If you want lively atmosphere and being in the middle of things Jumeirah Beach Resort would be a better option. Nice Executive lounge and right on the beach. Lots of restaurants and shops minutes away. Hilton The Walk are the apartments behind the original hotel and are great for families or large groups with very spacious accommodation.