We've stayed at the HRH twice. First time standard room, last year club level. Last year when we stayed unbeknownst to us prior to check in the club level lounge was being renovated. They had the lounge set up on the lower level. We are going back this year and will get to enjoy the lounge on the 7th floor.
The advantages to club level are the offerings throughout the day. Breakfast is continental style including bagels, pastries cereal etc... with the usually coffee, tea and juices. They had all the major newspapers available. Very convenient and quick in the morning to allow an early start to the parks.
They had soda and waters available throughout the day.
They had an hors d'oeuvre's beer and wine in the evening. Each night had a different theme or culinary style.
After that they would have coffee etc...and cookies for the evening.
The other advantage was they had Concierge service right at the lounge and we utilized it to make various reservations and in my case locate a book I had left poolside the previous evening.
You also have free access to the fitness center and a discount for the poolside cabanas. (I made the reservation at the health club)
And lastly lets not forget the fluffy robes...lol