For me, it's hard to choose. Every location has prying eyes:
Fantasy: strip mall; A&W and Taco Belch and their drive-thrus full of soccer moms. Rear parking is viewed by several residences.
Penthouse: Second Cup next door is owned by a cop and is well-patronized by his co-workers. Also next door is a Club Fit and a comic book store. Across the street is a 24-hour Internet cafe. A-Channel is a block away, so you risk getting filmed entering the front door while Dawnie is forcasting the weather. Rear entrance may have the occasional homeless person shifting through the garbage, or a male hooker on 104 St.
Eurospa: shares a busy strip mall with Tim Horton's, Subway, porn shop, an East Indian grocery, and a vet. No rear entrance.
Cloud Nine: a large warehouse-type building shared by a strip bar and a Chinese restaurant that was once known as The Chef's Table; Lube City on the other side of the parking lot. No rear entrance.
XTC: deserted strip mall save for a liquor store and a rather unsavory drinking place named "Better Be Rock", which likely doesn't play any music created after 1990. There is also a Mickey D's in the vicinity that's currently under re-construction. There is a rear entrance - but in such a bad area of town, why take that chance?
Deja Vu: large strip mall across the street from the Mayfield, so there is a good chance of running into your parents who are attending the dinner theatre; strip mall includes a convenience store, registry office and a strip bar. Apparently there's a rear door.
Cove: across from the pseudo-country bar known as Cowboys, their thick-necked, black-T-shirted bouncers, and their clientele of too-young-to-handle-their-liquor teenagers; next door to a convenience store. Rear entrance, I believe.
Head-To-Toe: in an apartment retail floor across 109 St from the Legislature (makes you wonder about their regular clientele); lots of balcony dwellers; lots of pedestrians to and from the river valley; LRT entrance nearby. Rear entrance faces 109 St and more balcony dwellers.
Supreme: Hidden within one of the uncountable strip malls on Calgary Trail.