Game has it that any man who cannot barge his way into 'sets' uninvited is a bit of a loser. In fact he will end up feeling a bit like a loser in either event because the success rate with cold approaches is very very low.
Mystery advises that the newbie go out four nights a week and spend four hours a night approaching. During this time he should approach three women per hour.
That is a lot of approaching, and there is no guarantee of getting so much as a telephone number at the end of it.
The alternative is to only approach women who are open to being approached. Every woman has her 'type' so do not worry if you are not Brad Pit. Just make eye contact. See what happens. You will know if it is on.
Dress a little better. Lose a little weight.