Starbucks is probably the most prolific coffee shop in my area. We also have a Dunkin Donuts and a few independent coffee places, but Starbucks is just about everywhere. They also have a mobile ordering app and rewards points, so they're also extremely convenient.
That being said, they need to be thought of as a treat instead of something I get every single day. I have coffee at home... a 10 oz. brick of Cafe Bustelo grounds costs me around $3.75 and makes about 10 pots of coffee. We usually get 5 largish mugs out of each pot, which is like 5 of Starbucks grande-sized cups of coffee per pot. Around here, a grande cup of brewed coffee at Starbucks is $3.25. 50 servings brewed at home would cost me $3.75 total.
Of course, we don't drink our coffee black and Starbucks isn't going to charge me extra for realistic amounts of cream and sweetener. Still, a quart of half & half runs me around $2.50 and has around 30-32 servings. Some use sugar in their coffee and we buy the organic sugar by the 10 lb sack for $13. I use liquid Splenda in the squeeze bottle in my coffee, which runs around $4.50 for 100 servings/squeezes. I also sometimes buy sugar free flavored syrups from TJ Maxx to make the coffee feel more fancy, and those are usually around $4 for a 750 ml bottle... so, maybe 25 servings per bottle? Even with the extras, I'm still saving a lot by making coffee at home.