I don't think those chairs were designed as "kilt chairs"...they're corner chairs.

But...they're handy when you wear a kilt...I personally dislike chairs with arm rests. It's much easier to get seated on a chair without....no pleat battle problems and the pleats on the side can hang like a japanese fan.

When I visit my favorite restaurant (five star kilt friendly) they make sure I get a chair without arm rests.

I mostly sit like the military....knees apart and feet "crossed"