Here is a high energy game that will involved a few of your leaders. You could customize this game, and the editable pages sheet to include all your leaders.
We played this game last night, and it was a huge hit. You give out cards with leaders faces on each sheet and you can give each leader a dollar, or candy bar for the first person to find them. We also added that if a student had all the leaders who were hiding to sign the paper we would give them a pop. This game took up at least 20-30 minutes of the night.
I was hiding downstairs in a secret spot waiting for students to come find me. It was a blast, and it really pushes students to get to know their leaders.