I'm a female, and a organization from my job, is having a holiday
dinner dance. The attire on the ticket says "Business formal attire
preferred". What is considered business formal attire.
“Business Formal” is much easier to define for men that it is for women. For men, it simply means a dark business suit, dress shirt worn with a silk tie, and dress shoes. It can include a French cuff shirt worn with cuff links as well.
For women, business formal features a skirted suit worn with hosiery and pumps (closed toe/heel shoes). As you know, fashion offers women many choices when it comes to suit kinds of looks. It’s puzzling that the invitation asks for this category of attire when the event includes a dinner dance. Holiday dance invitations usually suggest semi-formal attire, which for women is dressy but not as tailored as business-formal apparel. Because Business-Formal attire and Semi-Formal attire is the same for men, I can only surmise that the hosts do not want women to wear ultra sexy, slinky, skin-baring outfits. This would not be wise anyway, as this is a work-related event.
Because it is a holiday dinner dance, I advise you to dress in a businesslike version of semi-formal fashions. Whichever outfit you choose to wear, stay within these guidelines for business-formal attire:
Wear long sleeves
Wear no garments that are too short, too tight, or so low cut that cleavage shows
Avoid strappy holiday sandals that ask to be worn without hosiery
Wear dressy pumps with appropriate hosiery (legwear with a slight sparkle is appropriate for an evening dinner dance).
Within those parameters, you can wear a more festive look than what we normally think of as daytime “Business Formal” for women. A dressy dinner suit (long or short skirt) or an outfit that includes a velvet or satin jacket would be appropriate. For a simpler look, you could wear a black business suit (made of fine wool or a blend, not cotton) and dress it up by wearing a lace or sparkly top as the layering piece underneath the jacket (a festive top that is not see through or low cut).
For other specific semi-formal-outfit ideas, peruse some of the other Bluesuitmom.com Q/As that I have recently written on what semi-formal attire entails for women. Just be sure to follow those guidelines above to comply with what the hosts have requested.