Professional bowlers bowl not forcefully but gingerly, lending the ball spin and preserving the unhatched robin eggs inside every pin. Strike softly with today’s Groupon: for $21, you get a bowling outing for up to six at Watertown Bowl, Inc. (up to a $45 value), valid at both the Watertown Bowl 18 and Watertown Bowl North locations. The bowling outing includes:

• Two hours of bowling
• Shoe rental for up to six
• One 12” pizza
• One pitcher of soda or beer<p>

Watertown Bowl’s sprawling lanes play host to up to six players during each two-hour outing. After lacing up complimentary kicks, parties can pluck neon-hued balls from orderly racks and snag a lane with or without bumpers. After striking down all 10 pins or splitting sibling pins from their perennial feuds, each player can sip pop or beer and munch a pizza slice decked with such toppings as cheese, pepperoni, bacon, and ground beef. Themed bowling events add excitement to each outing, and groups can schedule their trips to coincide with alley happenings such as Family Thunder Alley, which charms clans with glow bowl, festive lighting, and tot-suitable music. During Weekend Thunder Alley on Saturday nights, orb-slingers can bowl in the dark as music blasts, lights flash, and balls moonwalk down the runway.

Though Watertown Bowl, Inc. sometimes offers discounted rates online, this Groupon still represents the best and most flexible value.