I would tend to wear a bow tie only as the PC is the tail coat for highland dress, however there are a couple of examples on this recent thread that should allow you to form your own opinion. These being, after all, just very wide long ties with a large four-in-hand knot.

http://www.xmarksthescot.com/forum/r...ighlight=ruche

As I almost never go to formal affairs, I have been checking the thrift stores for a brown tweed to convert for occasions such as you describe. No luck so far.