I have had this exact situation with one exception.... there were 12 boys, not 5.
What worked for us was classic comedic scenes. We looked at mime (a la Buster Keaton and Chaplin), slap-stick (Three Stooges) and Abbott and Costello. They identified what they thought was funny and went online (SUPERVISED) to find modern corollaries. The guys loved it and found things from today that echoed everything we looked at in class. We discussed how comedy was built (e.g. how Abbott and Costello can get 10 minutes out of Who's On First with the same bit over and over again) and their observations about voice and physicality were on-point. They also were able to try their hand at each form we looked at. They had some success, too- most notably with Abbott and Costello's 7 x 13 = 28 which they obtained permission to perform in a few sixth grade math classrooms where the teachers worked the 'bad math' into their lessons.
If you are doing a stage combat unit, you can do the opening scene of Romeo and Juliet. Abraham, Sampson, Gregory, Tybalt, Benvolio. (Cut Balthasar. He doesn't have any lines anyway.) I start with the thumb biting and end with the Tybalt/Benvolio fight. You can trim the dialogue a bit. We use cut pool noodles for swords. My middle-schoolers love it.
Markham Woods Middle School
6003 Markham Woods Road
Lake Mary, FL 32810