What to wear to a Ceilidh?

[Sir William]

I note what Sir William said in his original post,but I wonder if there is some minor trans-Atlantic confusion? Three,perhaps it is four, of the UK members that have posted on this thread, regard a ceilidh as a rather informal bash/dance and are all pretty much agreed(amazingly!) that the dress is pretty informal. On the other hand you chaps across the pond seem to have a different definition of what a ceilidh is. Am I wrong? Also it seems to me, that you chaps over there want to be more formally attired as well? Nothing wrong with that! Just an observation.

Jock,

You're spot on based on my experiences in the States. I've noted that at an American ceilidh you see a lot of kilt jackets and ties, if not a Prince Charlie, or even more formal wear (and equivilent for the ladies). I found this a bit ironic considering our tendency to dress more casually than the British for almost all occasions.

Therefore, I was rather surprised at the Scottish ceilidh I attended as it was the Scots who were more smartly dressed than the Americans and Canadians. Perhaps the Scots did so thinking the North Americans would be following their usual custom, and the North Americans dressed more casually thinking they were observing the Scottish custom.

All of which is has led me to my question. I'm just trying to get a sense of what is assumed to be proper attire on both sides of the Atlantic.

From the answers posted so far, it would appear my assessments above are more or less correct and what I saw at the ceilidh in Scotland was a slight abberation.