I have always gone in Indy and there was never a line. You do want to show up early for the best seats, but unless it's an especially popular film, there's always been space. It's pretty fun.
Meijer has Sauder ones for $35 if they're in your area. Here's a pic: http://meijer.shoplocal.com/meijer/default.aspx?action=browsepagedetail&flashbrowse=y&storeid=2465829&rapid=662920&pagenumber=5&listingid=-2090214929&ref=%2fmeijer%2fdefault.aspx%3faction%3dbrowsepageflash%26storeid%3d2465829%26pagenumber%3d5%26rapid%3d662920%26prvid%3dMeijer-090208C