With eight players a round-robinis possible - everyone plays everyone. That's 7 rounds and the fairest result: no luck of the draw, the winner beat (or didn't beat) all. The downside is it takes more time.
If the evening is tight, take the Swiss systemover 5 rounds: everyone plays 5 games, opponents are matched by score, the winner emerges faster. For a friendly group that's plenty.
Counting on blitz 5+0: one game up to 10 minutes plus a couple to seat. A round-robin for 8 (7 rounds) is about 1.5-2 hours. A 5-round Swiss is around 1-1.5 hours. Blitz 3+2 is even faster. With only 2-3 boards, play in turns - the bot waits for the round's results, then deals the next draw.
A scenario for a group of 8 (garage, apartment, cottage): blitz 5+0, a 5-round Swiss, a symbolic prize for the winner. Create the tournament in the bot @vibechessbot with /create_tournament, enter everyone (simplest as guests by name), /start_tournament, then /next_round between rounds, and /finish_tournament at the end. Full breakdown in the organizer guide.
Two options: round-robin - 7 rounds (everyone plays everyone, the fairest result), or Swiss - 5 rounds (faster, opponents matched by strength). It depends on how much time you have.
Round-robin: in 7 rounds everyone meets everyone and the winner is objectively strongest. Swiss is a bit faster, but in 5 rounds not everyone plays each other, so places are also decided by the Buchholz coefficient.
On blitz 5+0, a round-robin (7 rounds) is about 1.5-2 hours, a Swiss (5 rounds) around 1-1.5. Blitz 3+2 is faster. With fewer boards the tournament stretches since games run in turns.
Ideally 4 - one per pair. But fewer works: play in turns, the bot waits for results and then deals the next round.
No, one organizer's phone is enough: the eight are simplest as guests by name, with results entered by the organizer.
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.
More people - 12-player tournament. About the round count - how many rounds in the Swiss. A fast format - blitz in an evening. At home - home tournament.