Macy's offers Nerf Retractable Tabletop Tennis Game for $7.99 (orig. $19.99) with free store pickup.  Shipping is free on orders over $25.

Product Description:

Easily convert any table with a width up to five feet into a do it yourself ping pong table, the nerf retractable table tennis set allows you to start up a ping pong game anywhere in seconds. The net stretches up to five feet, but can be attached to smaller width tables.

• Overall product dimension - 12.0" L x 2.75" W x 110" H
• Weight - 1.72 lbs
• Set includes - 1 net, 2 paddle, 3 table tennis balls, 1 carry bag
• Suitable for ages 12 to 15 years
• Bring table tennis virtually anywhere -our retractable ping pong set lets you enjoy the game without the need for the bulk of a full ping pong table, an ITTF standard regulation size net of 5' wide ensures your matches are as competitive as the pros
• Quality materials that last -the components of this set are just as high quality as a full table tennis kit, the paddles boast solid wood and durable rubber faces, and the ping pong balls the appropriate weight for a truly pro experience