Have everyone count the number of letters in their first name. Now ask them to find someone who has the same number of letters. Those two are now partners. If a a person can’t find someone let him/her use another name s/he is called by (i.e., a student named Matthew may use the name Matt and then look for someone with 4 letters instead of 7.) If they still can’t find someone pair up with a person who has the closest number of letters.