At Olympia Fields North, and with no contrived long walks between holes, one can easily play courses of between 2 and 18 holes, starting on the 1st and ending on either the 9th or 18th. It's helpful if no one else is on the course.
2 Holes - 1,9
3 Holes - 1,11,18
4 Holes - 1,2,8,9
5 Holes - 1,2,8,11,18
6 Holes - 1,2,3,7,8,9
7 Holes - 1,2,3,6,7,8,9
8 Holes - 1,2,3,4,5,7,8,9
9 Holes - 1-9
10 Holes - 1-8,11,18
11 Holes - 1,11-18,10,9
12 Holes - 1-9,10,11,18
13 Holes - 1,2,3,7,8,9,10-13,16-18
14 Holes - 1,2,3,6-13,16,17,18
15 Holes - 1,2,3,7-18
16 Holes - 1,2,3,6-18
17 Holes - 1-5,7-18
18 Holes - 1-18
In my opinion, one of the reasons the routing of OFCC North is so brilliant.