We stayed concierge at the Grand last October. We had 5 people in our party and our room only had two beds. There was a sleeping bag available, but we ended up with two kids and one adult in one bed and two adults in the other!
We reserved a theme park view and we were on the 6th floor facing the Paradise Pier section of DCA. It was a spectacular view at night!
The lounge is on the 5th floor. I'm not sure if all concierge rooms are on the 5th and 6th floor or not, but even if not, the lounge is right near the elevator. The food offerings were great. In the morning there were plenty of fresh fruits, pastries, cereals, toast, bagels, juices, tea, hot chocolate, coffee, etc... IN the afternoon they have snacks such as little sandwiches, fruit and veggies with dip, and yummy cookies. From about 5-7 they put out cheese and crackers, veggies, and one hot item. One day it was crab cakes, one day it was quiches, etc... There are fridges stocked with water and soda. Beware that the soda is in glass bottles and you will not be allowed to take them into the parks. You can take the water though.
There is a TV and a few couches to sit on. They have board games available to play as well. There are newspapers and you have access to a computer where you can check your email, etc... They ask that you limit your time to 15 minutes.
The lounge has a nice outdoor patio that you can sit on. The view is not that great though. You see other rooms (I saw a naked man one morning!!!) and you can see a bit of DCA.
If you have any specific questions, I will try and answer as best as I can!