Multiple girls in your entire college is fine. Yes, there's risk that they're friends and you come up or "this guy in my class" comes up, but that's the risk you take.
Multiple girls in the same class can be a bit more risky, because there's far more likely of a chance that they become friends of some degree, and then you would almost certainly come up, or they'll be wary of your game through simple observation. I've lost several girls for this very reason - I was gaming 3 of my lab partners at the same time a few years back and out of nowhere they all went cold on me. Could have been a coincidence, but I doubt it.
What do I do? Do I always ask out in person? Or start exchanging numbers?
For girls in your class, flirt and talk with all of them until you know which one is the most practical / your best target. It's usually better to ask them out in person as is, and it's very easy to be walking out of class together, and screen her usual logistics..
It's even better to have an instadate after class, especially if you
lead her to bed.
For girls in your university in general, I personally would just go for it. Go for instadates > setting up dates > just getting numbers, but sure, do whatever seems more practical in that given moment. Screening for logistics is huge on determining what you should go for.
This could be..
- you don't have enough time to build a good connection, have shit to do and might not see her again, grab her number
- you have a good connection, but both or one of you have class / an exam, set up a date for later then grab her number
- you haven't built a great connection yet, but you're both free, suggest an instadate
- it's fucking on --> take her for a walk and start moving towards your house/dorm or hers
No matter the circumstance, chances are you will fail and people will find out. You'll also succeed, and people will find out. Failures teach you and actually empower you to create more success. Sure, preselection and social proof are factors to consider while traveling down the road, but the more action you take the faster those things take care of themselves.
The smaller the pond, the more noticeable the actions of every fish are, and the larger the pond, the less significance these actions make. But no matter the size of the pond, the fish does not grow without action.
Hue