Japanese idol group AKB48 hold meet-and-greet events in which its young idols shake hands with their rabid fans. It's a chance for their adoring public to rub elbows with their favorite singers.
Some of AKB48's fans are older. Some are young. Some are cool. And some are not. I know the difference, you know the difference, and you can bet pop stars like Yuki Kashiwagi (above) know the difference.