I wear business casual, and I don't work on a laptop.
Audience members are asked to dress "business casual or nicer".
The look is what the fashion trade calls "business casual."
They are meant for business casual and more general wear.
"But business casual led some to interpret that flexibility too broadly."
These days, most companies in the software industry allow business casual at work.
And not just any old "business casual" ukase will do.
Reservations are recommended and the dress code is business casual.
If she wore the coat, she was all business, still casual, but working.
Call it business casual for being on the spot - neat, to be sure, but not too formal.