Video games improve eye-hand coordination by requiring fast finger-work and switching into "stop hitting yourself" mode at random. Improve your reflexes with today's Groupon: for $10, you get admission for two, 120 nickels, two slices of pizza with up to two toppings, and two small drinks at Nickel City in Northbrook (up to a $21.50 value).

At Nickel City, a pantheon of games stands ready to dispense diversion for the paltry price of one—or several—nickels. Admission (a $2/person value) grants access to more than 100 nickel-operated games, so customers can live out their car-racing, dance-battling, and foie-gras-fighting dreams. Defeat concentric circles during a game of skee-ball, or feel the thrill of stationary racecar driving to win rows of tickets, redeemable for prizes or high-fives. Thirty free-play video games, including Pac-Man, Tetris, and Mortal Kombat, keep thumbs flexible. Between battles, the famished fortify themselves with two pizza slices with up to two toppings (a $4.50 value each) and two small soft drinks (a $1.25 value each) before reentering the fray.

Nickel City offers its own deals at certain times of the week; plan ahead to make sure you're redeeming your Groupon at the most opportune time.