From the official WDW website regarding the two levels of concierge service in the Contemporary Resort:
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Concierge Service:
Some rooms offer concierge service which includes personalized front desk and guest services, turndown service, refrigerator, coffeemaker, and lounge with continental breakfast, midday snacks, evening wine and cheese, and evening cordials and dessert. The Tower Club offers limited concierge service, continental breakfast, midday snacks, and refrigerator (upon request).
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I stayed in a Tower Club room last Christmas. Here is a link to my on-line photo album that contains pictures of the concierge food offerings:
click here. I really enjoyed my CR stay (it was my first). The Cast Members in the Tower Club were nice, helpful, and pleasant to work with.