I'm not sure I agree with the idea that US Courses are open and inviting, regardless of where you live. I will absolutely concede that a nicely worded email or phone call to a professional at some private clubs, even without reciprocal club membership, can work some magic. I also think society events, charity events, and sites like this one can open up access for people who truly love golf and golf courses. One also might try to meet the superintendent at the bar and buy beers till he relents to sneak you on the course on Monday. But I still think the clubs where that will work aren't in the same class as the ones being discussed in the UK (or that are in Ireland, or AUS for that matter), and ultimately it just isn't simple to get on the elite courses in the U.S.
Golf digest world top 100:
http://www.golfdigest.com/golf-courses/2014-02/worlds-100-greatest-golf-coursesOf the top 10 in the world, No.'s 4, 6, 7, 8, and 9 have information on their websites explaining on which days visitors are welcome to come play their golf courses and how much it will cost, and how to arrange play. One could plan a trip around that with a budget and a schedule and without knowing anyone (possibly needing only a proof of handicap). Examples: Royal Dornoch
https://www.royaldornoch.com/GreenFeesAndBookingInfo County Down
http://www.royalcountydown.org/Visitor_Info.aspx In fact of the top
20, 10 are outside the US and only one them (Hirono in Japan) would require a member with you to play it. For the other 9, just check the website, schedule a tee time, and head out.
The other 10 of the top 20 are in the US. The one that is easily playable (Pebble) puts the UK greens fees to shame. As far as the others...the "schedule your visitor tee time" pages of the websites must be down for Pine Valley, Augusta, Cypress, Shinnecock, Oakmont, Sand Hills, NGLA, Merion, and Fishers...
Of the rest of the top 100, one can play nearly every non-US course fairly simply (outside of a few in Asia that have similarly exclusionary memberships). In the U.S., the absolutely lowest ranked US course is #97 Baltusrol GC Lower. I have a feeling
even there my a cold-call to the pro for a tee time later this summer would strike out...
I think you likely have within your
lifetime, using connections, charisma and cash, been lucky to play a lot of incredible private courses in the U.S. But we could set up a trip to Ireland and the UK within the next year and get on all of theirs with just the cash and our handicaps. I certainly wish we could do that here.