Just the Tip: When You Should Add Gratuity

Yianni, Leah, and Liz are going deep into the question on everyone's mind: when should I leave a tip? When you sit down at a restaurant to eat, the answer is clear, and the same can usually be said when you pull a stool up to the bar to grab a drink. But what about your gas station attendant (yes, we're recording from NJ), the person who made your meatball sub at Wawa, or the drive-through attendant at Dunkin'? Would your answer change if we said Starbucks? Let's get personal...ho...