Love / Polish winking women - does it means she's interested in me? [9]

Hi, I just joined this forum today for some help! This may be an old topic, sorry if so - I have had a look through old topics and found some info but not specific, but maybe it's too broad a question so specific is not possible. It's about winking - I get the idea Polish men wink at people just as a friendly hello but what about women?? A woman who works in a shop was overly helpful and friendly to me yesterday (I think she is Polish but not 100% certain) and before I left her face was a bit blushing and she gave me a wink and a big smile. I have seen her before. She is very attractive and if she is interested I definitely am too, but I am shy (and a coward!) and I don't want to say anything that would embarrass her (or me) in front of her colleagues. So, do Polish women wink and smile at everybody, men and women, as a generally friendly thing or is she saying she's interested??