Coffee continues to be the most efficient fuel for the human body's complex system of fuel injectors, auxiliary hearts, and flux capacitors. Fill up your flesh tank with today's Groupon: for $5, you get $10 worth of café fare at Kaffee Prost! in Adamstown.

The baristas at Kaffee Prost! serve coffee, specialty beverages, and light fare in a comfortable, art-soaked setting filled with the quivering notes of weekly live music. Coffee and espresso drinks ($1.75–$3.75) made from locally roasted beans pace energetically through the shop, and italian sodas, lemonades, and coolers ($2–$3.50) swagger by in colorful arrangements. Egg sandwiches with ham or bacon ($3.95) give eyelids the protein they need to retain muscle tone and strength in the morning hours, and lunchtime fixings such as the turkey-bacon-avocado sandwich with chips ($6.25) or the homemade tomato-basil soup with a grilled cheese sandwich ($4.95) connect lonely stomachs with semipermanent companions. Hershey’s ice cream ($2.95 for one scoop) and sweet delicacies from Love Handles Pastries pair well with coffee, double as desserts, and triple as fanny-pack fillers.

Guests are welcome to sip on their own alcoholic beverages in this BYOB establishment surrounded by yellow walls, hand-painted murals, and canvasses from local artists. Large purple high-backed chairs and an old-fashioned orange couch caress consumers as they access the free WiFi and discuss the ample selection of books, from Homer's Iliad to the popular treatise about Earth’s heliocentric orbit, Twilight. Patrons are encouraged to bring their own musical instruments, and on Saturday, Kaffee Prost! features free live music from 6:30 p.m. to 9 p.m.