Sydney Junior Rugby Union will be conducting 7s competitions for both girls and boys across the Sydney Basin and will be called Saturday Night Sizzling 7s. In , Rugby 7s was played at the Olympics for the first time. The Sizzling Sevens Competition runs on a Saturday evening and is open to both Girls and 1. Juli - Juli. Sydney Rugby Union has seen the number of players enjoying this game sky rocket in the last few years. SATURDAY NIGHT SIZZLING 7S COMPETITION.