i'm 21 and buy most of my stuff from spotlight (big craft/fabric/homewares chain in aus) and find the ladies who serve to be very unhelpful, especially if you are younger. i get the distinct impression they think i'm wasting both my time and theirs.
Spotlight corporate were in the news a while back for how badly they treat their employees.
Locally, they work extremely long shifts with little breaks, and the management never put extra staff on when there are big sales and things. Spotlight employees DO NOT
get staff discounts on anything (which I always thought was one of the few perks of working retail! For shame!).
I always remember this when confronted with someone who looks like they just swallowed a big batch of lemon juice (and lots of them do!)