I have always perceived that a more direct approach (could be called Mode One Hardcore) made more sense in nightlife venue approaching.
When doing approaches in supermarkets, I've never had any complaints or drawn the attention of the staff.
There are approachers who have gotten in trouble for approaching in a shopping location. The Toronto mall PUA guys were a well known case of it in 2013. I think a lot of the approaches were not calibrated and more like spam approaches.
Unfortunately this wasn't the only pick up event scheduled on arguably the worst day ever to hold such an event, December 6, the National Day of Remembrance and Action on Violence Against Women and the 24th anniversary of the l'Ecole Polytechnique...
www.vice.com
Most reasonable approachers will be like us, not catching attention from the outside world.