How does one make their arms skinnier at the gym? Seems kind of contradictory, then again whoever has seen me would know that I am not an expert in the athletic arts.
Easy, you excersize. Burning calories = potential fat burn = potentially less arm fat.
Gyms are usually all inclusive, so its not just heavy weightlifting but cardio machines as well. And even in weight lifting, it takes a buttload of training to get arms bigger in muscle than fatty arms and usually lifting very heavy. Which I am sure cj is not doing but rather high-rep, low-weight toneing.
Rowing is good, and you could also look to see if your gym has one of those machines where you use your arms basically like you use your legs on a bicycle. Its just two rotating handles that you hold and cycle your arms with.