The savory skewers popular at traditional Brazilian steak houses arose from a 19th-century accident involving the gauchos’ famous love of darts and an inopportunely parked deli truck. Pin down your dinner with today’s Groupon to Rio’s Steak House, valid at its Plymouth location. Choose between the following options:

• For $15, you get $30 worth of Brazilian steak-house fare and nonalcoholic drinks.
• For $25, you get $60 worth of Brazilian steak-house fare and nonalcoholic drinks. This option may only be used by tables of four or more.<p>

Rio’s Steak House furnishes a sizzling ballroom, where skewers of savory meats whirl au naturel, coquettishly divested of seasonings’ guise. The centerpiece of this rich revelry is the all-you-can-eat rodizio dinner, for which dutiful churrasqueiros visit each table with a fistful of carnivorous delights, from a well-done rump roast to an edible necklace pendant made of sausage ($12.99–$19.99). With the rodizio comes a visit to the hot-and-cold buffet, which touts crisp greens alongside an ever-shifting selection of Brazilian cuisine. Pescetarians might split a vessel of moqueca, a Brazilian-style fish stew with cilantro, tomatoes, and the house’s secret spice blend ($18.95, serves two). Bookend your meal with the paradoxical fried yucca and sausages ($7.99), which, like most local curmudgeons, are outwardly crunchy yet inwardly soft, and the luxuriously toothsome pudim de leite, a golden bar of baked custard ($3.90).