As well as being played by club sides, rugby league sevens is particularly popular with social teams, formed in the workplace or from the patrons of a public house for example, as it is often difficult in these places to form a full squad of 13 players and four substitutes of regular players.
[1] The major tournament was the World Sevens played prior to the beginning of the National Rugby League season in Sydney, Australia.
That tournament has been suspended but sevens is played around the world at different levels from junior teams to international ones.
Sevens is considered to be a good tool to increase the skills of players and to help emerging rugby league nations.
[4] The World Sevens, the world's premier sevens event while it operated, had two 7 minute halves up to and including the semi-finals with extra time played in the event of tie at the end normal time.