Drinking Again...

So last weekend I had margaritas with Ms. J and friends.  This weekend is a "Black Tie" martini night at AL's place and the following weekend is the 2nd anniversary of my didn't happen wedding celebration.  So here is my dilemma.  What do I wear?  Regardless I have to go shopping for something -  I have a black dress and satin bow stilettos - it's well loved - I have to buy a new support garment for it.  The purple dress below is more summer than I think this party is - I also need to purchase shoes and a purse for it.  Or I can scrap that all and see if i can find another option...

I am inclined to just go with the black dress - as the purple one - which I purchased in NYC I am inclined to wear for my birthday when I've had a chance to get a little color.

Suggestions? Questions? Comments?