Cold approaching random women alone is already tough enough, but a while group is extremely hard to pull off. You have to entertain the entire group and somehow slowly isolate her away from the rest of the group. This is not an easy task by any means.
It is extremely rare during the day to ever see a woman out alone, they are almost always in groups or pairs. It doesn't matter if it's the shops,supermarket or just the streets, they always travel in groups.
How do you Cold approach when every woman is in a group.
This is just one approach style of many;
Never approach the hottest girl (the one you're really after) directly or immediately. Start chatting with one of the 5s or 7s, and don't make it cheesy, pretend like she's a millionaire's daughter and you're just networking.
Talk about something in the present moment as an ice breaker "man this DJ is playing his guts out, why is he so sweaty though?", keep the banter light. Ignore the hot one and pretend like the conversation you're having with the 7 is getting super fun (sometimes it really is, they have richer personalities than the dimes 95% of the time). Laugh loudly when she cracks a joke, break the touch barrier, make it a way more fun conversation than what the other girls are talking about.
The 7 might introduce you to the group, but it's not necessary. You want them to slowly all glob onto you two because they're seeking a good time and you two seem to be having it. Most of the time if the hot one is interested in you she'll come over by you two and try to inject herself into the situation, because dimes can't stand when their sub-par friends are getting more attention than them, they've grown in an environment where they're always the center of attention so they project that. It also disarms the group to see one of their friendlier, nicer girls getting some love.
And that's usually it, you're in with the group. You can slowly draw the 8s, 9s, and 10s into the conversation for some social validation, or just tease them.
Most of the time it really drives the hot ones nuts if you continue focusing on the sub-par girls and even obviously ignore the hot ones like spoiled kids when they try to interject. It's definitely a good way to tease and test them for high quality, and it shows that you're different, that they have to work for it. Enjoy the group as a whole, and when they've all decided you're chill you can take your shot with the hottie by dancing with her or talking to her about her sub par friends that you now have some intel on, "Rachel is so chill where did you find her?"
Don't try to force anything, it's like geopolitics, you want to keep a good relationship with the group. A lot of times you'll get a couple conversations out of it and a number of the 7 you vibed with, but that's still something to draw on next time you're going out.
You typically want to take your time rotating to the hot one, work the group for bit, maybe even try convincing them to go to another bar/club that you like better. And don't be afraid to decide they are just not up to your standards before politely exiting.
This is the most innocent strategy, there are other more sinister and effective ones, but you must prove you're ready for the dark arts.
Cold approaching groups during the day is different though, typically you want zip in and zip out, but it's very situational.