Pat,
On my recent tour through Australia, I noticed that many of the 'Sandbelt' clubs had 19th holes, including Royal Melbourne, Kingston Heath & Yarra Yarra. At my home club, we are bringing back a 19th hole that had been part of the original Stanley Thompson design. Not only is it a great tie-breaker hole, but an excellent safety net should a hole need to be closed for maintenance, renovation, winter-damage etc.
TK