Aim for 15+10 or 25+10: the games have substance and the event still fits into half a day. Blitz at 3+2 is physically awkward for many - not because of the thinking but because of the speed of handling pieces and clock.
Four or five rounds in a day with a proper break. If the event is a regular one, one or two rounds a week is better still: more convenient, and it builds the habit.
Working out the length - the schedule.
The requirements here are higher than at an ordinary tournament, and this is the main thing an organizer has to get right.
Venue and layout - hall layout, equipment - sets and clocks.
The one genuine difficulty is digital. A sign-up link and an app do not suit everybody, so keep a simple route open: registration by telephone, or a paper list at the door.
Good practice is to run the tournament in software without requiring the participants to use it. The organizer enters the results and the players read a printed table on the wall. The Vibe Chess app has a guest mode for exactly this: a player with no account is added by hand and plays and scores like everybody else.
How the process works - taking registrations.
Prizes matter less than attention: a certificate with the player's name on it, the results read out loud, a photograph for the local paper or the venue's page are all valued above a souvenir.
And the important one - announce the date of the next event immediately. This audience attends regularly and plans ahead; a series with a monthly or seasonal standing works far better here than a one-off - why people stop coming.
15+10 or 25+10: the games have substance and the event fits into half a day. Blitz is physically awkward for many - because of the speed of handling pieces and the clock rather than the thinking.
Morning or afternoon, on a weekday or at a weekend. Evening events draw noticeably worse from this audience.
Bright, even lighting, chairs with backs, step-free access, complete quiet with no background music, water and ventilation. Large pieces and clocks with a big display are essential rather than optional.
Keep a telephone route and a paper list at the door, and run the record-keeping yourself in software. There is no need to require an app of the participants: the organizer enters the results and the standings go up on the wall.
Libraries, community centres, day centres and social clubs for older people usually provide a room free and have their own interest in the event. Chess clubs are generally free during the day too.
The Vibe Chess app opens from a link and needs no installation. Setting up a tournament takes a minute: pick the system, set the date, the venue and the time control - the app handles the rest.
for a large field: opponents are matched by score, you choose the number of rounds
for a small circle: everyone plays everyone, the round count follows from the field
no rounds, no pairings: players sign up and pick opponents at the table
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.
Other audiences - beginners, family tournaments. Venues - library, workplace.