According to the formal rules of etiquette, it is not proper to wear a suit unbuttoned, unless it was designed never to be buttoned (as with certain formal dress coats and tailcoats in the 'white tie' dress code).
Yes. Follow the related links for images of her wearing the jacket unbuttoned.
No, but some reenactor girls want to be sexy so they wear it unbuttoned.
A tuxedo is vest formal a suit is tie formal you would wear a tuxedo at a wedding or prom or something like that you would wear a suit at a business or a funeral or anything like that
men can wear suit and women can wear semi- formal
An informal attire is relatively formal than the casual attire but less formal than semi formal. You can wear a trouser with a matching jacket and an open collar shirt as a suit for informal wear.
it will be better if it was black
a thong :)
formal suit
if i would was in your situation i would wear a suit or something that looks formal
A Bat Mitzvah girl can wear appropriate formal wear, such as an elegant dress or a pant-suit.
A Cocktail Party is a little formal so Girls should wear a cocktail dress ( doesn't have to be black) for Guys a suit and formal clothing
Formal evening wear is usually black and white clothing. Men usually wear tuxedos or a tailcoat accompanied by a tie and a vest. Women will wear dresses.