The annual Mencap Dodgeball Championships return to Wimbledon Park in September, raising money to support people with a learning disability, as well as their families and carers.
Anyone can get involved, provided they have enough willing and able friends; teams require six players and two substitutes, with a rule that there must be at least one female player from each team playing at all times.
Fancy dress is also a requirement, with all team members expected to dress along the same theme. There's a prize for the winning dodgeball team, but maybe even more coveted is the prize for best fancy dress team.
Spectators are very much encouraged: Alongside the tournament family events take place, including an auction, food and craft beer stalls, and music throughout the day.
Tickets to take part are £30 per person, which includes a chance to play in the tournament, entry to the after party, and a case of beer per team, courtesy of The London Beer Factory, which is sponsoring the event.
Interested? Rally the troops and sign up today, as places always sell out in advance.