To the older posters like myself, I would say it is more common now that;
-the guy alsmost always makes the first move in Japan
-there's a jealousy factor with some Japanese guys versus gaijin guys trying to hook up (cultural envy, size envy, I don't know)
I have been cockblocked in America, but only once that I can remember. By telephone, but I didn't feel bad, I figured that's life. Once in Hong Kong a taxi driver told my girlfriend that foreigners don't live long (poor health), etc!
Like Gaijinpunch said, try other places, maybe like a phone booth or your pad!