There's 1.06 males born for every 1 girl. Men outnumber women until you get to the 50+ age range, then there are more women.
I know what you mean though. I used to go to bars and clubs and they're all sausage fests. But that's because most guys go looking for a woman, but as others said, women have plenty of options so they don't need to go to clubs for that.
Also I noticed every party I have ever been to was a sausage fest. Every single one. The best ratio I ever saw at a party was like 60/40. But the norm was 75/25 and sometimes much worse. There's two reasons for this. First, a lot of women have girls only parties. But even when they have parties with other guys, they're sure as fuck not going to be inviting ugly guys. As an ugly guy, the only parties you'll ever be allowed in will be sausage fests. This is why when you're an ugly guy, the world seems like a sausage fest.
Also as an ugly guy, women gravitate away from you, which further creates the illusion that men outnumber women by a much more than they actually do.