You sound like a fun romantic sweet person OP, reminding me of ...me :-)
I know though if I was this excited about a guy (and you are) actually the waiting days/hours/weeks to see if he calls would be painful esp if he never does call.
I feel protective of you in this situation as you are planning to put yourself out there without feeling your way through it first.
i am this those saying go for it, but not in the way you have planned - be more artful. Go there for your daily java, find innovative ways to strike up casual conversation, banter back and forth a bit - get a name , add to social media, see what he is like based on his social media pages once you have friended him - current gfs, lifestyle etc - at this point you may still be interested or actually you might not be
Then from the position of an acquaintance or a new friend - go in for the kill. Dont do it from the vantage point of a stranger.
If youre going to play the game (and you should in this instance) , then always only ever play to win.