3 generations at the night club?

Grandchildren & daughters
Grandpa & Dad
Daughter & Mum

After nearly 5 years of being a dad I still haven't got my head around these names when three generations are together.

At the 2-penny pushers in Bridlington during a clichéd British day at the seaside; donkeys, amusement arcade, bucket&spades, ice cream, roller coaster and dodgems