Panera (also known as Saint Louis Bread Co.) has a coffee subscription (or as I call it, a coffee club) where for $8.99 you can get unlimited coffee. You can, basically, get a free coffee every hour, every day. We did this and now I basically get at least one free iced coffee from Panera, usually more. Why iced? Because Panera's iced coffee tastes good, you don't have to wait for it to cool to enjoy it, and it has been so warm lately regardless of the season that iced coffee just hits the spot.
Now, this coffee club is, of course, supposed to be a loss-leader. Panera anticipates someone will come in for their free coffee and end-up buying a sandwich, a flatbread pizza, or the like. I won't deny that on occasion I might have grabbed a muffin to go with my iced coffee, but at least 90% of the time I just run into one of my favorite local locations, get my iced coffee, and take off to continue my day--in and out of the store in under 5 minutes like a boss. I loved getting my iced coffee for what is basically free after my first three or so visits in a month and plan to continue doing so into 2022 and as long as they still offer the club.