if she didnt give you her email andyou say you got it from the mass email list thats more creepy i think than going to her work and talking to her. If she has a job like at blockbuster where you can go in and buy something and bump into her by accident thats ok Id say. Its especially a good move to do this if she doesnt know you kn ow she works there so if she seems happy to see you and not looking at you like wtf are you doing here Id try to find a way to ask for the number again.
OR give her yours somehow.
OR give her yours somehow.