NYPL, Rock n' Roll Hall of Fame, and a few art museums

Museum of Modern Art

Facebook

1,461,658 Page Likes

4,512 New Page Likes

Twitter

1,516,597 Followers

14,151 New Followers

YouTube channel, foursquare, flickr, RSS feed

Nelson-Atkins Museum of Art

Facebook

51,755 Page Likes

109 New Page Likes

Twitter

14,610 Followers

152 New Followers

Instagram and YouTube channel

Louvre

Facebook

1,077,828 Followers

4,371 New Followers

Twitter

58,456 Followers

989 New Followers

Rock n' Roll Hall of Fame

Facebook

184,844 Page Likes

595 New Page Likes

Twitter

35,830 Followers

132 New Followers

flickr, MySpace, YouTube channel

NYPL

Facebook

103,990 Page Likes

557 New Page Likes

Twitter

293,633 Followers

1,339 New Followers

tumblr, Pinterest, GooglePlus+, YouTube channel, iTunes, foursquare, flickr, mobile apps, RSS feed

no policy, but