I stopped by Vinaigrette today, a new vinegar and oil store at 50th and Xerxes and loved it. It is a small store with about six vinegars and 18-20 olive oils to taste and purchase. They offer bread to taste with and everything is available to taste. They also have some soda to taste a couple of the vinegars with as they make good sodas.
They sell everything in bulk. Basically you can purchase anything in either small or large bottles that they fill on site. The bottles can be brought back and refilled at a discount. They also have some paintings for sale and some olive oil based skin and hair care.
I ended up purchasing a Porcini Mushroom Extra Virgin Olive Oil and a really nice balsamic vinegar. I ended up talking with the owner (I assume) for quite awhile. They are willing to open up their space for small events and had a couple other vinegars that weren't out yet. The actual grand opening will be on November 7th and they will have chefs in there doing demos.