Cooking, like taking a pop quiz and defusing a bomb on national television, is often a source of stress. Disarm your hunger with today’s Groupon: for $15, you get $30 worth of American comfort fare and nonalcoholic drinks at The Blue Comet Bar and Grill in Glenside.

Rockabilly crooners serenade an inked-up array of diners at The Blue Comet Bar and Grill, where chefs bebop over stoves laden with a menu's worth of succulent steaks, sandwiches, and seafood. Homemade soups ($3.50/cup; $4.25/bowl) prelude piping-hot sandwiches such as the grilled peanut butter and jelly ($5.25) or the home-cooked meatloaf and cheese ($7.25). A half dozen cold sandwiches shuffle onto salvers decked in hearty mounds of ham, roast beef, or liverwurst and onions ($6.25+) and nestled between slices of swirled rye or rare Johnny Cash LPs.

Fresh mussels cannonball into tender beds of linguini drizzled in homemade marinara ($16.95), and a pair of handmade crab cakes splashes alongside steaming sides of potatoes or veggies ($19.95). Acoustic musicians enrapture ears on Saturdays, and rockabilly bands take the stage on Sundays, launching toe-tapping riffs beneath the full bar’s collection of vintage posters and a taxidermic boar’s head that compulsively requests "Free Bird."