Start with the block or building chat - almost every one has it. Put out a call: "Saturday we're running a chess tournament by the benches, come along." Usually the old-timer amateurs, dads with kids and teenagers all respond. Even 6-8 people is a proper tournament.
A notice on the entrance door works too. Give those on Telegram a link to the tournament - they sign up themselves. Neighbors without a phone you add as guests by name on the spot.
The venue - benches by the entrance, tables on the playground, or the nearest park. An outdoor format is blitz 10+0 or casual rapid without strict clocks: outside you can play relaxed, capping games by agreement. Five rounds run in a couple of hours on a good day.
The bot @vibechessbotdeals pairings and "tables" (bench numbers) and counts the Buchholz table. Nobody argues who plays whom or who won - it's all on the organizer's phone.
One tournament easily becomes a neighborhood event: run it every summer or on holidays and keep a "hall of fame" with champions' names. Such tournaments bring neighbors together better than any cleanup day. And if a steady group of amateurs forms, see the chess party article on how a yard game grows into a club.
6-8 is enough - already 5 rounds and a fight for first. Even four can play a shorter one. The bot runs a small group or the whole block equally calmly.
The organizer adds them as guests by name on the spot. They play like everyone else, and the organizer enters their results from their own phone. Only the person running it needs a phone.
Not necessarily. Outside people usually play without strict timing, capping games by agreement. For more pace, open a free clock on a phone, one per table.
The Swiss system evens it out: after round one strong plays strong and beginners play beginners. A rated grandpa and a beginner schoolkid both get interesting games at their level.
Usually players bring their own - many have one gathering dust at home. One board per pair (half the players) is enough.
The bot is constantly improved based on real tournaments. If you need a feature that isn't there yet, message the developers right inside the bot with the /support command. Many features appeared exactly because organizers asked for them, and useful ideas get added quickly.
At home - home tournament. Outdoors - chess outdoors. For a crowd - chess party. General prep - how to organize a tournament.