I think something like this could also be really fun and productive to use in class, because it helps you think about the text in new ways. They use some real quotes from the text, and also play with the characters. Although I like on-stage theater to stay close to the text, I have to admit I was amused to see Crampas and Effi flirting through emoticons and reacting with "WTF".
|"we can't begin until the theater is quiet.." (haha)|
Here are some more funny examples from the "play". (A bit out of order, sorry)
|mother, telling Effi that Innstetten has asked for her hand|
|viewers voting on a wedding dress for Effi|
|Where are the letters?|
Here is the link to the entire "production."
A link to more about the production in English.
And some press in German. Der Tagesspiegel, „Gefällt mir“: Fontane als Facebook-Theater