I haven't witnessed it personally, but I have it on good authority that the Living Computer Museum drops lures during business hours. Pretty smart plan on the whole, since a major feature of the museum is to play restored old-timey computer games and it's a safe assumption that their visitor base will also be playing pokemon go!

Since I'm in the museum field myself, it's a really interesting question how museums are responding to pokemon go (from zoos where it's really encouraged and beneficial to the Holocaust Museum where having a pokestop was disrespectful to say the least).