Cold approach is bullshyt. Your hit rate will be less than 10% and you'll have to waste a lot of time talking to 100 girls just to get 5 numbers and bang one.
If you want to approach efficiently (30-80% success rate) and not waste too much time on it, three rules:
1. Wait for indicators of interest (girl giving you eyes, coming to sit close to you etc)
2. Learn to spot indicators of availability (basically a girl who's dressed up but looks kinda idle)
3. As a last, desperate resort, hit on girls who are undeniably less attractive than you.
These factors make your approach a "warm approach," and you will get up to 80% success on getting a nice reception and a number.
If you want to approach efficiently (30-80% success rate) and not waste too much time on it, three rules:
1. Wait for indicators of interest (girl giving you eyes, coming to sit close to you etc)
2. Learn to spot indicators of availability (basically a girl who's dressed up but looks kinda idle)
3. As a last, desperate resort, hit on girls who are undeniably less attractive than you.
These factors make your approach a "warm approach," and you will get up to 80% success on getting a nice reception and a number.