Not every activity has to be a brain-bending thinking skills challenge. This is a simple, fun ice-breaker perhaps best used at the start of a year so learners can start to find out a bit more about each other.
Students are given a "bingo grid" of questions to ask their peers. Pictured is an example I have used in INSET sessions to give you an idea. Students are not allowed to ask consecutive questions to the same person - they must move on, so a lot of movement around the room is required.
You might also engineer a question or two so that a new member of your class (perhaps a recent arrival from Country X) is the only person who is likely to be able to answer (e.g. "Find someone who can name three cities in Country X").
Can also be used to activate prior knowledge at the start of a topic ("Find someone who can add 2/7 and 5/8", "Find someone who knows two dangers of smoking") or as a plenary activity at the end of a unit. Noisy but fun.