Becoming friends.

Click HERE for a fluency activity (high beginner on up) aimed at getting students to connect with each other.  It takes 45 minutes to an hour.  There are 3 sets of questions. Each set gets a bit deeper. They talk about the ones that are interesting to them for about 10 minutes.  

This is based on research by Arthur Aron, Stony Brook University. 

I simplified this from something on the Greater Good Science Center, Berkeley.  
https://ggia.berkeley.edu/practice/36_questions_for_increasing_closeness#data-tab-how 
HERE is a link to the original research. 

And here's a video you might use to introduce the topic,