In our church's sanctuary. That's the 500 building in the Southwest corner of the church campus. (We have 6 buildings, by the way). It is the building that has a reddish-orange awning and a wall covered in ivy. If you see a nice young couple standing there with a book and a table, go see them. They are very nice.
That's the 300 building or "the cafe." Just wait until the end of the ceremony then follow all the people leaving the sanctuary. Most of that group will be flocking to the building on the Southeast corner of the campus. Fun fact: The Cafe is where Gage and Kat first met!