Royal Caribbean offer 4 free drinks for Diamond, 5 for Diamond Plus (me), and 6 per day for Pinnacle. It resets at midnight everyday.
The Crown lounge is for Diamond and above, unless stated otherwise (if there are too many Diamonds, then they are cut out). Drinks in the lounge go against the limit.
They also offer free internet (amount depends on level), a free 8 x 10 photo, discounts on other photos ($10 per photo on my last cruise), a repeater party with alcohol. Also included are near daily hor'devres in Cabin, 4 bottles of water, bottle of.wine or gift (Diamond Plus) and extra beverage. There are many other benefits too. Wish Carnival did similar but I'm sailing on Carnival soon. Looking forward to see how the food offerings compare.