Here are a few fun scripts to consider:
"Rock, Sword, Firecracker!" Short comedy about the legend behind the game of Rock, Scissors, Paper. 3+ actors (any gender)
"Touched by an Alien" Short comedy about space explorers that discover a new kind of alien. 5 actors of any gender (plus possible non-speaking roles).
"Stung" A short comedy about someone who wants to be one with nature but nature doesn't like her. (4 speaking parts with possible extras)
"Fart-Zen" - very short play for three or more actors (any gender)
Get some big old sheets for a curtain, use a rope to hang them, get chairs or towels for seats and make popcorn. Invite your families of all your actors to come see the show.