Comment Use Low Tech (Score 1) 167
Buy a large number of signs (laminated paper, plastic signs, small flags, paddles; may be single color or double faced, or similar). Have the vote taken by holding up the sign.Then have people count the votes in groups and report to a central person
OR
Take a picture with a digital camera. Load the picture into analysis software (I used to use a photoshop filter that counted the number of distinct dots in a color range in fluorescent microscopy, cant recall the name) and then you will have a definitive count.