I advise you to first try it out in a rented space.
That will need some funds. Why don't just have it on someone's place?
Maybe try with some free courses at schools. Ask principals if they would like someone to tell children about blockchain and decentralized money, for free.
This could be the least thing they can do. However, this will be quite a long talk especially if the principal isn't aware of crypto currency.
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Much better to seek for a group, this way they can easily have a small talk then when they got interested, sure they will tell it to their friends and acquaintances.