malls are great for practice - iv been sarging them almost every day for the past 2 weeks straight and its paying off. =] i recommend sarging HBs in clothing stores and music stores but moving sets may be a bit difficult depending on how crowded ur local malls are. department stores like Myer are also pretty good and try opening sets in the food court.
the HBs working in the stores are by far the easiest to approach and sarge as they're generally pretty bored and are up for an interesting conversation. also, try going into female clothes/accessory stores and using an opener like "im looking for something nice for my teenage cousin/niece, what would u recommend?". most of the time i walk into female-only stores i get opened so that makes it even easier, just make up some story for why you are in there like above. female stores are always teaming with good sets and 90% of the time the workers are fucking hot.
a trap that iv fallen into too many times is getting too carried away with the 'customer-act' i.e. dont appear to be overly interested in the store-items otherwise they'll treat u like a customer and u DONT want that [as they're programmed to treat u differently]. just avoid this by diverting the conversation early-on, to other topics outside the shop items.. e.g. 'Hey by the way the other day i read this article in X Magazine and according to a recently conducted study, women actually lie more than men. What do u make of this?'
happy sarging,
peace.