I am a little wary of "straight pride" groups or affiliations, if they in fact exist, for the same reason I'm a little wary of "white pride" groups. That reason being that such groups seem more like a political statement against gay pride or black groups or whatever than their own thing, and tend to have hints of bigotry in them. It's not that such groups would by definition *have* to be political statements against minority groups or have hints of bigotry in them, it's that in practice, they usually seem to.
The thing is, when you form a "pride" organization or something similar, usually it's because you're part of an often-disparaged or discriminated against minority group. So, you form an organization that lets you and people who are like you and agree with your cause celebrate who you are as a counter to the general cultural message that would say you are explicitly or implicitly somehow "wrong" or "less than".
I don't see where straight white people are discriminated against for being straight and white very often. And I say that as a straight white guy. So why do we need a straight pride group? The gays have one because they are standing up for themselves against discrimination and such.