Liberating structures 

Liberating structures is a website resource for workshops, tutorials and collaboration. 

You can find a list of their methods on this page 

https://www.liberatingstructures.com/ls-menu/

Examples of methods we have used 

1,2,4, all http://www.liberatingstructures.com/1-1-2-4-all/ 

Liberating structures - impromptu networking http://www.liberatingstructures.com/2-impromptu-networking/