The event will be cocktail attire :)
Yes, there are a few places within walking distance from Quincy Hall - Indeed Brewery, Centro (bar), and Earl Giles Distillery. Nicollet Pavilion is also a few minutes by car with a strip of restaurants/bars and a walking trail.
Yes, there will be a parking lot with plenty of spots and Uber also available. Please see travel page for information regarding hotel shuttles.