Dress help? fancy tea

[amberlyrose]

I have a President's Tea to attend for an organization I'm in. Usually, the tea is held at someone's home with sandwiches brought in by little old ladies and is more laid back. This year, it is being held at one of the more exclusive country clubs in the area. I feel way out of my league. I'm also a committee chair this year, so I may have to speak and introduce myself, which isn't helping my shopping anxiety.

Budget is about $150 to purchase or less than $100 on RTR. I'm short, hourglass shaped, and not a fan of my upper arms so sleeves would be nice. 
I have two dresses in my closet that could work, but one is sleeveless and a little low cut and the other is navy, which I feel may be too dark for this occasion. I wish I could get a mash up of the two. I'll PIP them in a sec. 

[rhody]

m.shop.nordstrom.com/s/ellen-tracy-cutout-neck-fit-flare-dress-regular-petite/4271145?origin=category-personalizedsort&fashioncolor=COBALT

[ginap]

shop.nordstrom.com/s/eliza-j-lace-fit-flare-dress/4412665?origin=category-personalizedsort&fashioncolor=GREEN

[mnp555]

m.shop.nordstrom.com/s/june-hudson-floral-print-wrap-dress/4366429?origin=keywordsearch-personalizedsort&fashioncolor=CREAM%2F%20BLACK

[amberlyrose]

hmmm. I may need to make a trip to Nordstrom this weekend. That green lace one that ginap posted looks like it could be a winner, but I'll have to see how the bust fits..