You’re hitting on everyone
A woman wants to feel special. She wants to feel you hand selected her out of the mass of females at the bar to talk to. She is not going to feel that way if she watches you for just ten minutes and sees you try to pick up on anything with pheromones. It’s fine if you’re on the hunt, but women cannot know that. Be subtle in your approaches. Don’t let one girl who you hit on see you hit on another one. If you can, avoid her even seeing you speaking to other females. Women are on the defense when out, and they look for a reason to write you off. Don’t give them one by being the sleaze of the bar.