Pontoon Puns

I told him "Whatever floats your boat!"

Some friends of mine like to rent a boat every year and go enjoy a quiet day of nice summer weather on a nice lake. One friend brought a stereo with her this year and asked everybody, "What kind of tunes does everyone want to listen to?"

I told her, "Pon-tunes!"

Groans were had by everyone else on the boat.

Edit: We were on a pontoon boat, not a pond.