Gradgrind and Gam

Today, I'm working with gradgrind and gam (the verb).

• When Poppy gams on and on about rules and regulations, restaurant owners believe her to be a gradgrind with no friends or social life.
• After the regatta, Nina gammed it up with CiCi Chesterton and the gradgrind boat captain about the specifics of their win.

Can you make a sentence with these words? Comments it in the leave.