What a total Dirk.

[Grizzly]

Maybe at a really really really dressy occasion or at the other end of the spectrum a renfaire other than that they are largely superfluous and in these days of tight security controls totally unnecessary. Nice to have in a collection though.

[orionpyoung]

If I understand correctly, if you are a piper or you are addressing the haggis.

[Downunder Kilt]

As Grizzly suggested, when you are dressed to the nines at a formal event, especially if you are an official. eg. part of the Haggis party at Burns night or a piper that is dressed in full kit. If you are intending to dance a bit though, you may find them a bit cumbersome. As for refaires, anything appears to go.