A year or two from now, Foursquare users may not have to take their phones out and manually check in to each location they visit, co-founder Dennis Crowley said in the latest "#AFewGoodMinutes" interview from Allen & Gerritsen. Foursquare may check them in automatically.

But won't that raise a few privacy concerns? Should we really tell corporations everywhere we go, as we go there?

"Whenever you're kind of inventing the future this happens," Mr. Crowley said. "I can think of the number of people who were like, 'I will never get a cellphone because I don't want people calling me all the time. And I will never get on Facebook because I don't want to share that stuff with people. And Twitter, that's not for me.' And this is just the natural progression of things."

Joel Idelson, senior VP and creator of opportunities at Allen & Gerritsen, previously spoke with PepsiCo's Shiv Singh about marketers' flawed approach to social media and with Russell Simmons about his new digital marketing firm.