This is some of the info I gathered on concierge before we went at Thanksgiving. Hope it helps:
Morning (7-10:30am): pastries, muffins, bagels, dry cereal, oatmeal, butter, cream cheese, jellies and preserves, peanut butter, raisins, granola and brown sugar, milk, coffee and specialty coffees, teas and juices and fresh fruits throughout the day.
There is a WONDERFUL espresso/cappuccino/coffee machine - press a button and you immediately get the coffee drink of your choice in your cup. The lattes were perfectly made each time.
Afternoon (11:30-3pm): Peanut butter and jelly shells (small sandwiches in the shape of shells), nuts, chips and snacks
Tea (3-4:30pm): scones, cookies and a few small pastries.
Evening (5-7pm): Meatballs, skewered barbeque shrimp, chicken and beef, beef and veggie rolls, chicken nuggets and wings, pastry topped with ham and pineapple and another with beef and vegetables.
Each night features a different mix of items from the resort's restaurants Boma and Jiko. There were chicken nuggets every night, and during our stay we had pork tamarind, Durban chicken, salmon, steak satay, veggie rolls, tamarind chicken flatbread, veggie flatbread, cheeses, crackers, and three varieties of Cape Indaba wine: Merlot, Cabernet Sauvignon, and Chardonnay. The wines are sold downstairs in Mara for $24 a bottle, but they are also sold at local wine/liquor stores for $6.99 to $7.99 per bottle, which is where I buy mine.
Late evening (8-10pm): Cordials, candies, fruits, nuts and cookies. People start arriving before 8 in anticipation of an array of desserts and cordials. Some people put a shot of Kahlua or other liqueur into their mug and add a latte or coffee. The desserts vary each night, and generally include something chocolate.
The best thing was the African Smoothie. They had three large drink dispensers at all times. Orange juice, pineapple juice, mango juice, iced tea, and a few other things, they switched off periodically during the day. One of the choices was this African Smoothie. It was a juice that was a mixture of banana, papaya, and a couple other things. It was really, really good.
The concierge staff is very friendly, and encourages the guests to stay as late as they want on the day of their checkout - into the evening if they wish. The room would not be available, but people can enjoy the lounge.
Concierge staff provide bottled water and cans of soda at no charge, which is particularly nice when headed to the parks on a warm day. Each night housekeeping provides turndown service, leaving chocolate mints and a card with an African proverb.
As far as the concierge rooms are concerned:
There are concierge rooms on the sixth floor (where the concierge lounge is) and fifth floor. The sixth floor rooms do not have as good of views as the fifth floor because of a thatched roof.