This place is insanely gorgeous! I just loved my time here as a guest of an event I attended recently. Every room seems to have a different feel to it. You could seriously have one heck of an event here with some creativity.
There's even a full working kitchen... which probably comes in handy for caterers.
If I was getting married (again:) or looking for a large event space I'd look here. You could really work some cool themes into the event. I'd love to do a Mad Men themed event here, it just seems to lend itself to that era. But I kinda think you could do anything with the venue.
The only thing that would be an issue is that you would absolutely need to hire a valet service. We all know what a pain in the ace parking is in the South Side, double that with a super narrow street and you're pretty much parking miles away.