Hi ally, glad to have you with us
Well, you (and uninspired him also) missed some great opening lines yesterday when the world didn't end (made and heard so many great jokes on this one) but you can still go with that as the fire is still warm
Now this staring thing is nice for a while, but how long do you think it will take until it will begin to feel a bit freaky and he begins to look more like an, as an old romanian saying goes, "dumbstruck ox coming home, only to find a new gate...doesn't enter, just sits there moooing"? Confidence around workmates and other people doesn't necessarily mean he'll be like that around all people, it just means that's his attitude in a familiar environment and is in no way a guarantee he'll maintain his level of confidence around women (i know people that are all Sarge McBadAs* around males but quickly turn to Mr SilentPuppyEyes when talking to women). Unfortunately i can't just tell him "Man up dude, you're taking too long" but i can ask you what i ask my "taking too long male friends": "What do you have to loose?" Just say to him that you find him interesting and want to know him better, it should be enough of an opening for him to stop mooing and enter the damn gate If he doesn't get this hint, man that boy is slow, but again, what have you lost? He gets the point, yeey, it's happy ally and coffee guy going on a date. He plays it dumb, you're back where you were before asking but at least you've got your answer: change the coffee shop and the coffee guy
Hook and release games aren't necessary here in my opinion (adding that time restrain i mean), as they will only drag a potential already dead horse.