Join a gay social organization, Such as: The Leathermen, or the Bears. These kinds of men into BDSM, or big hairy and beefy have social organizations all over the USA, and internationally. Many major cities Worldwide, have these gay social groups or clubs. Most (gay bars) world-wide, are used to host gay social events. (ask a gay bartender, they can usually tell you about what kinds of social groups, use their bar, and perhaps give you contact information).
Lacking a gay community resource center in your city, you could probably go to a gay bar, and ask the bartender if they know of any gay social organizations that might be worth joining based on common interest.
Some gay men get politically active too, by joining political action groups such as PFLAG (parents for lesbians and gays), or the Equal rights campaign, or perhaps HIV or AIDS Charities. The social concerns that face the LGBTQ community can be a way to meet new people.
Lastly, and this is one that some gays despise. . is Church. . yes Church. . Some gay men can come from a very (traditional) and or conservative background. Some of these kinds of gay men can find comfort in others who share the same religious view. There is a Church in the USA called the MCC church, or (metro church of christ). this church, came out of universalism and Unitarian faith. In its inception, the MCC church was meant to serve (ALL) types of people and does not turn them away. An MCC church service might have a lesbian couple in attendance, alongside 2 men in leather, who are alongside a transgender couple, or a drag queen. The MCC church accepts everyone, no matter what orientation, or the way you look. It is faith that brought these people together. . and some men can meet others and befriend them through church.
These are just a few ideas I came up with, as I sat down and read your post.
Syl'