Girlfriend coming to visit in a few weeks

So I've lived in the GR area for over eight years and just last year went off to school in DC and met an awesome girl there. She is coming to visit on the 18th of July and I was wondering if the reddit GR community knew of anything that I could take her to do. Besides the obvious, such as going to Lake Michigan, swing dancing, the GRAM, etc., what else should I put on the shortlist?