I went shopping, no opportunities. I went to yoga, without my cards. Two women from the previous spin class continued to chat 5 minutes into the yoga class. I was contemplating what to do when they stopped. I realized that, even without cards, I could nicely approach the women and say, "Perhaps you didn't realize that the yoga class started, would you mind finishing your chat outside the studio?" Live and learn.
I have realized that in all situations there is a nice, gentle way to handle breechers of etiquette!