Well, I once had a guy do a "squat-and-arch" (don't know how else to describe it) in front of me and then trace the contour of my chin while saying "Oh, you are gay, aren't you" to me. I got the message, but the whole animal-style-mating-dance of the situation kind of turned me off. Though, I'm not everyone. Many species seem to go for it. You might try it and see if it works.
This is kind of what it looked like if you want to practice, I think the music was the same too:
Mr. Not So Lonely Wrote:don't try to be clever just walk up to him and say "Hi would you like to go out some time? "
Be honest and tell him you would like to get to know him.
Just be yourself. (if you do not know you may want to introduce you to yourself.) lol
I think that line is kind of risky. It has the ability to scare guys off actually.
The word 'Some time' makes that potential guy thinks that you are demanding a 'long term date' even before having a first date.
I know this because I have used this line twice with two guys who flirted with me on two different occasions. They panicked and practically ran off. Maybe I was unlucky. Maybe I delivered the line the wrong way. Maybe there are guys who don't mind with the 'Some time' pick up line.
I agree with Rainbowmom suggestion. Ask him out for coffee or go get grab a bite together. Be on point and specific. But of course, you need to break the ice with him first. You can't just barge in and asked him out if both of you do not know each other. Smile is a way to communicate and it works as an ice breaker.
Watch some "How I met your mother" Learn from the best Barney, might be little awkward, but could work as well.
Just kidding just be yourself and say Hi.