Invited guests at Foster Friess’s birthday party in 2010 were asked to pick a favored charity. The Wyoming multimillionaire and his wife, Lynn, were both turning 70. To celebrate, they would pick one of the guests’ chosen causes and donate $70,000 to it. At dinner at the Jackson Hole Four Seasons, guests were all handed envelopes, and whoever had the winning one was asked to stand up while everyone else remained seated.