Sisters (Pleiades) - Constellation
Sisters (North London)
Dials (Brighton)
Tiles (game in India played by two teams, using a ball and a stack of 7 tiles)
Colours of a rainbow (it is a continuum really)
Names of musical notes
Wonders of the World (ancient and modern)
Days of the week
Seven swans a swimming
Several things can come in groups of seven, such as the days of the week, the colors of the rainbow, and the deadly sins in Christian theology. Additionally, many musical scales consist of seven notes. In a cultural context, the "Seven Wonders of the World" is another example of a notable grouping of seven.
Soda comes in groups of 6
states
dogs
what comes in groups of 12
Arms, legs.
gaggle of geese
Pennies
Inches in a foot
scorpion legs
Case of beer