A friend of mine had her wedding reception here and it was beautiful. The Piper Palm House is specifically the best place for a reception, and the caterer for them is the Butler's Pantry, which had great food for the reception.
They also do a brunch here on Sundays so you can check out what it looks like before you try to book it for an event. The brunch is also excellent.
Just a historical note: the Piper Palm House is the oldest standing greenhouse west of the Mississippi River.