Astronaut cooks have made numerous attempts to wrangle hamburgers into space-ready meals, from dehydrated-pickle disks to vacuum-sealed burger bottles. Enjoy what our starry-eyed brethren never can with today’s Groupon: for $5, you get $10 worth of signature burgers, fries, and soft drinks at Steel Trolley Diner in Lisbon.

Winner of multiple awards, Steel Trolley Diner's succulent stable of signature burgers ($6.29 each) is enhanced by symphonic sauces and fresh-cut fries ($1.20 extra). The Marley burger bathes a patty in Jamaican jerk sauce and orange-chipotle mayonnaise, and the Elvis burger derives its flavor from the same bacon, peanut butter, and banana-jam recipe the King used as shampoo. The eatery's kitchen craftsmen traditionally mold each burger's midsection with a half-pound ground-beef patty but will gladly supplant meaty disks with a vegetarian Boca burger, tasty turkey burger, grilled chicken breast, or a printed-out photograph of a burger for no extra charge.

One of the few original 1950s burger joints that are still standing, Steel Trolley Diner provides an ideal venue for Baby Boomers to reprise old hoop skirts, leather jackets, and Model-T costumes. Patrons can rehash Cold War anxieties at a cozy leather booth or scrutinize Happy Days anachronisms while sitting on one of the counter's upholstered stools.