so i have made a decision which started yesterday at my college to eat lunch/dinner by myself and force myself to sit with good looking girls and eat with them. i've used a few openers that have worked well, the latest being the "opinion" on a dog or cat as a gift for my little sister, but i have trouble deciding whether or not approaching a group of 4 or 5 girls is a bad idea. groups of 2 or three are in my region and i tend to just talk, eat, and leave with no numbers because iam not at that point yet. and i do not enjoy sitting by myself. can there be a group of girls too big to approach? or is the confidence displayed in front of a crowd like that good shit? I think i will be able to do it because i have good eye contact skills, and i am confident with what i say most of the time, but i have a harder time keeping up the conversation with 2 or 3 girls. what if i only have 4-5 group girls to chose from? any thoughts would be much appreciated.

No, there is not a limit to the size of the group you approach.
Bingo.

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Amor est Vitae Essentia

^ hit the nail on the head

but since you said yourself that you are still not comfortable enough to always number close, maybe your comfort zone has to grow through experience. start with sets between 1 and 3, that should give you an opportunity to have either just a target or a target and one or two of her friends that can allow you to not divulge all of your attention on the target, atleast right away