Tom:
A high-end public here in Wisconsin that has added yardage is University Ridge, outside of Madison, WI, which is owned and operated by the University of Wisconsin-Madison. It offers no "memberships" per se, although it does have some volume discount passes for regulars, and it is the course for the UW-Madison golf teams (men and women), which arguably is something akin to membership. The university decided to lengthen the course -- the work is done, and was completed during the past two years -- because: a) players/equipment have "shortened" the course since it first opened nearly 20 years ago; b) college players in particular (mens) have just gotten exponentially longer; and c) the university wants to land some high-profile tourneys, particularly the NCAA Div. 1 national championship (mens), and perhaps even a pro mini-tour event. All of those have been cited as reasons to expand the course.
Details: Opened in 1991 at 6888 yds (par of 72, but with 5 par 5s, 5 par 3s, and 8 par 4s -- a little different than the usual 10-4-4 mix on a par 72). It has been lengthened to 7259 yds, from the tips. The adjustment hasn't been made in just the back (black) tees, either; the course from the blues and whites has also been lengthened, so no matter what tees you play from, you're playing a longer course than you did when it first opened. It's a Robert Trent Jones Jr.-designed course, and he was brought back to consult on the lengthening.
Hole details from this thread, with some pics of the new way-back tees:
http://golfclubatlas.com/forum/index.php/topic,38431.0.htmlMy own view, although I haven't played the new back-back tees, is that in a few instances (mainly the par 3s), they are forcing length on some holes that aren't designed to handle that length. But I'd also add those new back tees are for playing a game with which I'm not, nor ever have been, familiar.
Hope this helps.