» Sun Dec 11, 2011 12:37 pm
If it was white-tie (as somebody else has pointed out), then I'd have to go get me the appropriate clothing.
However, since you're wearing a polo shirt, I'm assuming you mean semi-formal, or maybe semi-casual. In which case, what I wear pretty much every day, black derby shoes, dark slim jeans or my black mohair trousers, a long-sleeved shirt, and either a cardigan or waistcoat, depending on how formal we're being here. I'd love to wear a full 3-piece suit everyday, but it'd be silly considering what I actually do.
Just realised my avatar is me wearing what I'd class as semi-formal (the jacket is hung up out of shot)