Ours is fairly no-frills. I'll give you the rundown.
Saturday: Open Houses
Members wear black pants (no cargo pockets or slits; cuffs allowed) and white button down shirt (long sleeves preferred, but three-quarter acceptable). Close-toed black shoes. Pins with wine and blue ribbon, provided by the Recruitment Chair.
House tours with rooms focusing on social, philanthropy, etc. We also serve punch and small snacks like sugar cookies, pretzels, etc.
Sunday: Skit Day (This gets a little elaborate)
We have a new skit this year: "The Wizard of Oz"
Members wear jeans and fall pick up shirt from this year (black t-shirt everyone has). Our recruitment chair is encouraging everyone to wear their hair in french braids or pigtails (you know, like Dorothy) and providing rainbow ribbon.
Our skit is looking like its going to be pretty elaborate, so it probalby wouldn't be of much use to you.
Monday: Formal Desserts
Members wear cocktail-length black dresses with nude hose and black shoes. And our pins, of course.
Tuesday: Prefs
Mmebers wear black dresses of any length with nude hose, black shoes, and pins.
As you can see, it's all stuff that everybody owns already, or should own (black dress, white oxford, etc.). With the decor I really can't help you, because outside of skits we don't decorate.
Best of luck!