"Can I help someone?"

I'm at the Starbucks on campus. I used to hate Starbucks. I still think their coffee is crap. But their labor practices are tops amongst large retailers. They are the antithesis of WalMart in this respect and I like that so much that I feel okay giving them my money for a double shot of espresso (which is what I'm "drinking" this morning). But today's observation is more of an ephemeral one. Every few seconds, one of the barristas calls out "Can I help someone?" Given the context of this environment, this coffee shop, this culture, this must be an existential statement. To which I almost feel led to reply, "Yes! This is your reason for being!" But who? Who to help?