I went to the midnight movies a fair amount. They had them every Friday and Saturday night at the Freemont theater in San Luis Obispo. We'd get stoned to the gills and go watch a really bad movie. It was the only time that talking and being raucous in a theater was not only tolerated but encouraged.
RHPS was the standard. I never did bring toast though. There were several movies that only gained fame through becoming Midnight cult classics. Night of the Living Dead, Eraser Head, El Topo, Kentucky Fried Movie, Warriors, Heavy Metal, Refer Madness, to name a few.
Ah... Fun times.