I joined a gym for a few months last year partly because I thought it would be a great way to meet some people. BIG misread on my part. It turns out most public gyms around here have a strong "leave me the hell alone vibe." Essentially zero eye-contact. Pretty much everyone had earbuds in and I didn't bother them. I said "hello" to those without earbuds once in a while but only got a silent death glare in response. So I stopped doing that.