You could try and make a DIY swamp cooler? There’s lots of instructions online for how to make them, and basically the only consumable is water. The only caveat is that they work by drawing hot air in from an open window to evaporate water, so it’s not very effective in high humidity or low temperatures.
I’ve recently been playing a lot of We Who Are About To Die, and even though it’s an early access game, its been great fun. It’s a roguelite physics-based arena fighter where you play as an aspiring gladiator, and fight your way up the ranks. The multiple types of matches and mutators really keep the gameplay feeling fresh, and the mechanics are surprisingly deep.
The other game that I’ve been playing a lot is Dinkum, which is somewhat like a mix of Animal Crossing and Stardew Valley, with heavy Australian Outback overtones. It’s a nice game to play with friends and significant others, since there’s plenty to do with a good mix of action and cosy gameplay.
I think posters/flyers are one of the most powerful ways to reach people in a local area, you’ve got to be in the local area to see them, right?
Another way to spread the word can be via the internet, Facebook is god awful, but a lot of communities will have something akin to a noticeboard that is another effective way to get the word out.