Cold approaching is great. Sure getting signals off girls has the best success rate but believe it or not, not every girl that finds you attractive will spot you in the club.

If YOU think a girl is hot and would like to chat with her to put your penis inside of her vaginal canal THEN do it.

That's all there is to it. Anybody that says differently is only bullshitting you. Don't go cold approaching aimlessly to every girl in the club like you're fucking Sapmi but also don't feel like you can or should only approach girls who are giving you signals.

I found my best successes came from girls giving me signals, usually looking over at me, but the best nights and best results would be from approaching girls I wanted regardless.

That said if you're having a laugh then approach as many or as little as you like.