Great information on the numbers.
Any further detail on who they were golfing with? Its more than just a game and relaxation for most as it can be an opportunity to meet and get to know new people to start or improve relationships needed to get the job done. A former boss of mine helped set up a foursome that included the CEO of a major corporation with Clinton, the ultimate schmoozer. As I recall Obama golfed routinely with the same people. Rarely newcomers. He was absorbed in it as a game instead of an opportunity to use his relaxation time as an investment in relationships.
The only person they describe as using Golf as a means to an end was Lyndon Johnson. He didn’t enjoy the game but saw it as a good way to get people he was trying to influence alone for a day.