A ton. I started working with exotics nearly 20 years ago and my first stop and near and dear to my heart was a Primate Sanctuary. They have since moved to Florida and I am still stuck here in Las Vegas but I often think of packing up and heading down there. Primates are one of the greatest loves and passion in my life.
If you are in the area of Gainesville, Florida and have an interest in monkeys consider helping out at Jungle Friends Primate Sanctuary. They can always use the help. I also have some lovely one of a kind hand painted art in my house from some of my monkey buds (they do a great job, lol) and it gets lots of attention from visitors.