Mirvish Productions’ new I Heart Musicals campaign is a fairly obvious marketing ploy to promote its current slate of musical productions: Once, Les Misérables, Aladdin, and The Musical of Musicals: The Musical. The I Heart Musicals Show Tune Karaoke night promises appearances by cast members from all those shows. So, if you do have a song in your heart, this might just be your (free) ticket—and you’ll a get a free button, too.

What else is happening:

Today In Offbeat at Gladstone Hotel