I'll just echo Gman's comments. Denver is a pretty kilt-friendly spot in my experience, but I think anywhere can be if you have the right attitude.

If you walk about with a confidence and swagger (not arrogant, just enough to get the kilt to swing), folk will pick up on that. You will get looks, look right back at em, and smile. You'll be surprised at how many reactions are positive.

Heading up to Canada for business is a couple weeks. While I can't take my kilt on customer site, I will bring one along for after hours.

Cheers,