When it comes to getting a woman's number guys can be really hesitant.  For some reason they just don't ask for it.

What I advocate is putting yourself out there.  Showing vulnerability but at the same time not putting too much emphasis on the outcome. 

If she's having a great day and you guys just had a fun interesting interaction she'll probably give you her number.  You won't need a silly routine or some technique to get it from her - just ask.

The key here again:  Have a great interaction.  Doing so will practically guarantee you will get the digits without much trouble at all.

If by chance she does say no, don't take it personally.  She may have a boyfriend, she may be moving out of the country soon, she may just be visiting.  There are a million things going on in peoples lives - if she isn't inclined to give you her number - it's more than likely not even you.

One more thing.  Phone numbers is in fact a numbers game.  Getting a handful of numbers a week.  When you or text to set something up you will notice a good percentage won't get back to you, some others will be busy.  This is the game. 

We improve our chances by meeting more people and getting more numbers.  It's that simple.

Go out there and start collecting those numbers guys.