Hate to break it to you but even in a "lefty" city, communist pussy is hard to find. Better than the burbs or bumfuck nowhere, that's for sure—I've lived it—but hard to find. Radlibs and anarchists are abundant if you're willing to compromise however. If you're not too old or picky, moving to a college town probably has the best cost of living to gf opportunity ratio.
Personally speaking, converting women to get a commie gf sounds like a real pain in the ass. I hate the feeling of handling people with kid gloves when we aren't on the same political wavelength. Respect to those of you who've pulled it off. How'd you do it?