NGLA. I stayed overnight in the clubhouse as the guest of a member, but didn't have the opportunity to play it. I walked it, however.
Shinnecock Hills. Though staying at NGLA and having had a lot of amicable correspondence with the club for past revisions of World Atlas of Golf, they wouldn't even agree to my driving up to the clubhouse for a look.
Sebonac. I saw a little of it from NGLA as I walked the course, but it was still under construction. Tom Doak had advised me to take a look, so I wandered over a few holes there, too.