Gym lines have one iron rule: timing. Mid-set is harassment, between sets is a gamble, and the water fountain or the exit is fair play. The material itself — gains, reps, spotting — works because effort is already the shared language of the room.
The compliment-shaped ones ("do you need a spotter") outperform the pure puns, because they offer something besides the joke: an actual opening to talk.
The gym is the highest-risk venue in this entire site: everyone is busy, headphones mean no, and a badly-timed line follows you to every future session because you will both be there on Thursday. The material works best outside the workout itself — the smoothie bar, the class queue, the mutual-friend introduction — where the shared gym context does the work without the ambush.
Safer arenas for the same energy: MMA lines where banter is the culture, running lines for cardio people, and swimming for the pool deck.

