TradeMark question

The owner of a local Golds Gym lets us practice in the aerobics room of his gym and my friends and i call our unofficial "club" Golds Gym Judo. I would like to get jackets made up for my two friends as a suprise not using the golds gym "strongman" logo but only using the words "Gold's Gym Judo" Am I still going to run into trouble even though not using their name?

Like what if their aerobics class got Golds gym aerobics t-shirts made up is their a difference?

Thanks a lot,

ttt for Trust