Things that come in groups of 16 include:
Basketball teams during tournament weeks, also 16 candles on a sweet sixteen birthday cake + you play with 16 balls when you play pool. (15 colored balls and one white.)
Soda comes in groups of 6
states
dogs
what comes in groups of 12
Arms, legs.
Inches in a foot
gaggle of geese
rugby teams
Case of beer
Pennies
scorpion legs
They are the 17 times tables