Not every, just most. The time I saw this used, I was quite interested to learn of the concept (as an entrepreneur admiring the idea) and find out about the band being promoted.
I've seen it once, which is a lot less than I've seen people checking in with Foursquare stuff which is excruciatingly boring.
I've seen it once, which is a lot less than I've seen people checking in with Foursquare stuff which is excruciatingly boring.