We've stayed Club Levl at The Contemporary, The Polynesian, The Grand Floridian, and I stayed once in a Business Class Room at Coronado Springs that came with a Concierge Lounge.
We only stayed one night Atrium Club at the Contemporary, so I don't want to be unfair in my review. I have to say this one is at the bottom of the list though. Of course a nice view (The parking lot can distract sometimes), but the staff wasn't around all that much, and I felt the offerings weren't as up to par with the other resorts.
The King Kamehameha Club at The Polynesian, in my opinion, is one of the best Club Levels Disney has to offer. By far the most hearty/amount of offerings that I've had so far at Disney World, and
Disneyland for that matter (I've stayed Club Level at both The Disneyland Hotel, and Paradise Pier). The service was wonderful, the food and beverage delicious, and the view for not only fireworks, but just in general is hard to beat. Not to mention extremely spacious and roomy. We'll be staying Club Level here again in July.
The Grand Floridian holds a special place in my heart, and we were so excited to finally stay Royal Palm Club in the Main Building. It definitely did not disappoint. The food and beverage offerings were plentiful/delicious, and whereas I didn't find them as hearty as The King Kamehameha Club, they were different from anywhere else I've stayed. I have to say the alcohol offerings were the best, and easiest to access at The Grand Floridian. Instead of just putting cordials out in the evening, they actually had someone on hand pouring for you. Not JUST cordials either. As moslty always at The Grand, the service was great. The resort is just so beautiful that for me, you always feel pampered and relaxed, ESPECIALLY staying Club Level.
Lastly, I have to say the Business Class Concierge Lounge at Coronado Springs was such a pleasant surprise. If I recall, it did close fairly early, and is much smaller than most regular Club Lounges. That being said, I was in town for work purposes, and was just staying there for a few days. I found myself not needing or wanting to go get much more food because I was completely satisfied with the snack offerings in the lounge. Great wine and beer options as well. It was along the lines of veggies, crackers, dips, cheeses, meats, one or two hot offerings, cookies, etc.. There was a Nespresso Machine as in most of the lounges, and the staff was very attentive.
I hope everyone's reviews and opinions can give you an idea of what you're looking for
.