Our school did demos during PE time at the elementary schools.
The 'team' usually consisted of whatever adults could get off work that morning, the instructor and the kids from the school - the academic school, that were enrolled in the program.
We had kicked around (no pun intended) to start a demo team, but in reality, the schedul was full anyhow and the opportunities to showcase a full scale demo team were few and far between.
So we usually did a few different forms, broke some wood, do a few one-steps and then let the school kids do a few kicks and punches.
Every kid got a flyer and a card for a free class (yes, only one, didn't know that other schools offer a week). No telling how many never made it home to the parents. Some years were better than others and the kid classes grew quiet a bit during May and June.
Other times not a nibble from the tour.
So the program looked something like this (same for each grade, 6 or 7 times):
Short introduction of the 'performers'
explanation of Taekwondo (no, it has nothing to do with Tai Bo or Thai Chi...)
Oath not to use the inspiration to cause trouble (that day. The other days were not covered in the promise

)
a few forms, preferably from the kids, but by adults if the kids were sparse that morning
One steps (done by the instructor...the jump spin kick ALWAYS got the AAAAHHHHHHHHs going!

)
Board breaking.
Short segment of exercise for the assembled kids:
How to make a fist, Sitting/horse(riding) stance basic punches.
maybe a few pushups
a simple front kick
handing out pamphlets
reminder not to kick and punch another.