It's not really difficult Shag. Most guys aren't very good grocery shoppers. If I'm in the mood and I see a guy looking a bit confused I just offer to help him out. I'm usually dressed casually but somewhat provocatively and if the conversation is headed in the right direction if he's so inclined he'll get a couple sneak peeks.
My husband has had a couple connections at a grocery store too. The latest was an attractive school bus driver who was shopping for candy to make up treat bags for her riders. She was a bit frustrated because the candy shelves were pretty bare and Bob started a light hearted conversation with her, Things progressed rapidly and in short order she decided to come to our house. I was here at the time and even though they could have just hit the bed themselves she was all up for a threesome.