Fashion Dilemma & Holiday Party DONT'S!

As a female you would think I would have at least one qualifying dress to wear to Josh and I's upcoming office party. However as I go through my closet a mere 9 days before said party I realize unless I plan to wear dressy pants and a nice top, I'm going naked and that wont be pretty. I have not one cute dress to wear. Last year the party was a Dave & Busters and I thought I dressed correctly but I walked in and realized I must have missed the memo because I was the only one wearing pants, besides the guys ;) I guess that's what you get when a bunch of guys put together a Holiday Party and leave out the attire section on the invite. Sheesh.

My dilemma is attempting to find the right dress in a week. I need a dress that goes well under a thigh length black coat and pairs nicely with plain black, peep toe pumps.

I found these four at Forever 21. All under $30. Top two are my fav's so far. Thoughts?

Just for laughs
20 Things NOT to do at your Holiday Office Party
1. Enforce the mistletoe rule: Make out with your boss, intern, or the significant other of either.
2. Interpret "dress festive" to include anything that could be worn as lingerie.
3. Split a bottle of anything with your assistant.
4. Wear reindeer ears and antlers.
5. Shovel shrimp from the buffet table onto your plate like it's your last meal.
6. Use a lull in conversation to force your table to watch you try to tie a cherry stem into a knot. This should especially be avoided if it takes you 25 minutes to do it.
7. Dance on anything other than the floor.
8. Use the open bar as an opportunity to get your boss - or yourself - plastered and ask for a promotion.
9. Sit on Santa’s (a.k.a. Eduardo from IT) lap.
10. Wear a holiday sweater.
11. Spend all night schmoozing with the interns.
12. Drink too much and share how you really feel about everyone in your department.
13. Wear a mistletoe headband.
14. Talk about work the whole time. It's not the time or place for a heated discussion about network security.
15. Hit on a coworker's spouse.
16. Hit on a coworker's very mature-looking teenage son.
17. Stand next to Ellen from Accounting, who gets amorous when she drinks.
18. Anything in the presence of a camera that you wouldn't want photographic evidence of in the company newsletter.
19. Raid the open bar like it’s an ex’s wedding reception.
20. Invite the boss to the after-party.