Most Helpful Girl
Well, what do you mean by 'go out'? Do you mean go on a date, or start a relationship? If it was a date, then sure, if we got on well and I was interested in him. If it was a relationship, then it would need to be major soulmate shit going on there. Otherwise, definitely need more time.
Most Helpful Guy
I always say it's best to know than not at all and I have asked out many girls out of the blue, cold, or the first time seeing them. You will get as much more rejection asking a girl that way, but nonetheless many people would also say yes, simply because they like that you have to confidence to do so, they also think you're attractive, funny, and gutsy. Every guy have a difference experience asking a girl out randomly and every guy has a different way of approaching, you just have to find what works best for you by asking many girls and simply moving on if they reject you. Hope that helps