More to explore:
message in a bottle -- seating chart display. fun!
framed seating charts
Wine Bottle Seating Chart | photography by www.katemurphypho...
Doors used as seating charts.
take a seat any seat...or the one you're assigned
Wedding Seating Chart - alphabetical makes so much sense.
No seating chart
luminarias as a seating chart
Use spools or corks. A great way to organize the seating arrangement and can alphabetize them for the reception.