On the surface of it, ska bands and improv troupes have little in common, outside of both being brands of entertainment that are more fun to produce than consume. But that might be enough right there, as the creators of the Holding Court Podcast have discovered. They’ve started a Tumblr called “Ska or Improv” and all you have to do is decide whether you’re looking at a ska band or an improv troupe. Not a game for the faint of heart, as it’s virtually impossible without resorting to a reverse Google image search. You can do that if you want (AV Club says one of the ska bands is calling itself “Skashank Redemption,” so consider yourself warned) but it’s probably just more fun to guess and leave it a mystery as to how many you actually got right …