I am taking my best friend to Chicago for her birthday weekend in August (1-3) & want to make sure it is extra special. We will be staying at the Thompson Chicago and I am taking her to see her favorite band play at Lollapalooza on Saturday. We arrive Friday night around 10pm and fly out at 9pm on Sunday. I know this doesn't allow time to do much of anything but, I would like to show her the best time possible. She likes art, culture & food so any recommendations along those lines would be great or if there is anything we absolutely shouldn't miss.