JAileen on “festive ?”
I want to add another experience: We were invited to another Christmas party several years ago. The invitation said “caroling”. We went dressed as above, in jeans, but festively. Another couple we knew from the other party (this is a small town) dressed the same. We were greeted at the door by the hostesses’ father who was wearing a tux! The caroling was not outdoors, but gathered around the grand piano. Everyone except the four of us was dressed to the nines.