I went to a movie theater yesterday and was surprised to see an advertisement for Slack on the screen during the pre-movie advertising time. I only go to the movies a few times a year but was surprised to see a topic discussed on this forum show up at a movie theater!

The Slack advertisement was animated graphics with someone speaking to explain the Slack service and lasted 1 or 2 minutes (I didn't time it).

I went to see the movie "The Martian". Perhaps Slack's placing of the advertisement fits in with the theme of their promotion campaign, as their web site main page shows the Curiosity Rover and states NASA at JPL uses their software.