Seating charts... sheesh, that just makes me laugh.
Heh...they attempted to have set seating for just the bridal table at my brother's wedding. Didn't attempt very hard, but as I recall, there was a general idea of where people would sit.
It was duly ignored, and everyone was happy. ;-)
Most people stood up during our wedding...the room was small and there was enough space for the elderly people to sit. We literally had to part the crowd when my dad led me in! It was great...I had Steve's long-haired hockey team on either side of me as I walked in!