At Vanderbilt Legends Club in Franklin, TN there are two courses. While the only holes that return to the clubhouse on each course are 9 and 18, there are plenty of points where the two nines collide and allow for numerous alternate routes.
On the North course, #4 and #13 share the back tee and also have a joint fairway. #8 and #14 tees are right next to each other. These two crossing points allow for numerous options if you want them. You could also go play #7 on the South course after #2 on the North course without much trouble if you were interested.
The South course is a bit less convenient to walk (though not difficult and I walk it regularly) just because 7 of the holes are on one side of a RR track and 11 are on the other side. 1,6,7,8,9,10, and 18 are on the same side of the tracks. It would actually be easier to play 1 then 6 than it is to play 1 then 2. 1,6,7,8,9 is a fun 5-hole stretch which gives you 2 tough par 4s, and easier par 4, a par 5, and a par 3. Because of the RR track crossing, you could easily choose to go from 1 to 11 or from 10 to 2 without adding any additional distance to the normal routing. 5 and 17 also return to the place where you cross the tracks, so upon completing either of those holes, you could choose to play 11 or 2 (on the same side of the tracks) or 6 or 18 (back on the other side of the tracks.)
In my quest to eliminate #10 South from existence, I've come up with my own consolidated 9 holes at the South course. #1, 11, 12, 17, 2, 3, 4, 5, 18. That would probably have to be done late on a weekday afternoon, but I might try it some time. You could pair that up with a consolidated North of some type, but I have trouble coming up with a routing that includes North #7, #11, and #17 - all of which I'd want included in my consolidated course. The problem is #17, which is doesn't have a good connecting point, but is a must play short par 4.
Confusing enough?