You will have little in common with women you meet by chance at bars and discos.
My suggestion is: Make a list of the things you really like to do. Are you into art? Reading? What are your hobbies? Do those things, participate in groups, take art classes, go to the places that are interesting to YOU. You'll find women with your interests, and that goes a long way in beginning a relationship.
Genuine interest in something is a great way to talk to someone you don't know.
It allows you to start non threatening discussions and a natural way to develop relationships.
If you are skilled in your avocation you can volunteer to teach it at a local community center
Women won't ignore you if you are sharing something interesting with them
Good luck!