I can't really do anything social media-related in that building because my data coverage is awful in there and my phone won't connect to their wi-fi anymore. Even though it's "improved", it used to work for me but won't now.Open the Smashville app.
One of the menu options is Smashville Rewards.
There is a check in tab on the bottom.
If you click on it, you can see the current game as an event to check in.
I believe you can aslo check in on Facebook if you linked it to Smashville and check into Bridgestone arena and say you are watching the game.