Your Update reminds me of my friend who had some DVD that cycled through posters of all the old black and white sci-fi and monster movies. He'd put it on in the background on one wall, using his projector while we'd be chatting, drinking beer, watching clips on his computer, etc.
I've thought about maybe buying one of those 42ND STREET FOREVER! DVDs full of exploitation film trailers. Though you can still see trailer collections on YouTube.