Girls go out a lot. They just go to better places than you do. They get invited everywhere. You don't.
General population statistics are useless because men die earlier. Are you sarging 70 year old widows? More men are born, but toward the end of life, there are many more women living.
Check out a link like this:
http://www.latimes.com/theguide/la-icumap,0,2003683.htmlstory
Look at how skewed things are in the prime ages.
And like those famous articles about UNC chapel hill, even if a college has 65% women, the bars are still sausage fests because the women don't want those guys. They go to better/exclusive parties where guys without connections will not be.