I do believe gym locker rooms are the best place to meet guys looking for gay sex. Being naked with other guys opens possibilities and I have been lucky a few times. One of my earliest memories was observing a guy dry himself as I was getting dressed. He was in mid 50, well built, about 5'10", 180. I noticed his cock was not just nice, but kind of semi hard as he used the towel to dry himself up. We were alone that late morning, and he noticed that I was looking and decided to give me a show and a better view. By then I was openly admiring his cock and we caught each others eye and smiled.
"Looking good," I said to him. He laughed and said, "Not much use as my wife does not use it enough. She is always working or too tired after work."
"Well, there are always other options," I replied smiling as I walked closer to him and sat down next to him, with my face eye level with his cock. He dropped his towel and I could see his cock in all its glory. Definitely not the biggest I had seen, but definitely a good 6.5" and nicely proportioned. "Your wife's loss," I said smiling. "Is she home now?" I asked.
"No, she works 12 hour shifts, so will not be back till 8pm," he responded. "I have the house to myself, if you want to come over."