Most golfers have none of those things except for the beer delivery. You're talking about the extremely rich, and professional golfers who have caddies with them. I've been golfing for around 10 years now, and I worked at a country club when I was younger, and I've never seen anyone actually use a caddy. For the beer delivery, why not? The course pays someone to drive around and ask if you want anything. It's no different than a waiter asking if you want a beer. You'll probably only see them once a game though, since their circuit takes longer than it takes to play a game.