So I [21M] has recently started approaching girls I find relatively attractive. I've had little success so far, however my main concern is accidently approaching someone who looks old but is actually under 18.

I know when it comes to age, asking a girl her age is a touchy subject. But how would I know, especially if they don't say.

This is a legit fear I have and I am hesitant to apprach anyone on the street. So I stick to bars and clubs. Where I more certain they are over 18.