Cocktail, please. But we want you to feel comfortable, so if those shoes are too high or that top button is too tight, let it all hang loose.
There is not a designated parking lot, however, there is free street parking available in Scott's Addition. You should definitely be able to find a spot, but just be sure to set aside a couple of extra minutes in order to find a parking spot. The good part is that you only have to park once since the ceremony and reception are all in one place.
The Urban Roost is Lunch Supper's event space, which is located behind the restaurant. If you go up to the friendly host/hostess at Lunch Supper, they will point you in the right direction.