Let your larger life goals, not your libido, direct you to where you need to be in life. If you do that, wherever you settle, the dating and the partnerships will follow.
I hear P90X and T25 sell everywhere around the globe these days. So no locale has beefier, more muscular, more ripped, more "average" (whatever that is, to you) openly gay males than any other locale of similar size, geography, geology, climate, politics, economy, and density. Some places might have more gay males... period.
You're not trying to market a gay-friendly gym concept. You're hoping to market yourself. Strive to enhance who you are to increase your pool of suitors. Improve the demand for your product, and the supply will take care of itself.
Life isn't a Maurice Sendak book. Don't wind up wasting years of your life forgoing things that truly matter in desperate pursuit of some imaginary island, just because some dude on Teh Internets told you Where The Beefy Guys Are.
Put down the tape measures for random citizenry, and instead use practical criteria (education, climate, economy, housing, political atmosphere, income, arts and entertainment options, etc.) to evaluate and determine where you truly, personally, wish to go. Wherever that is, your dates are waiting for you there.