How about a little keyboard karaoke?

You may have sung karaoke to a CD.

How about to live piano?

Jolly’s Dueling Piano Bar (2006 Chestnut St.) is starting "Keyboard Karaoke," a weekly contest at which pianists “Tony T” DeCarolis and “Wildman Joe” Marchetti will accompany the contestants. They offer 500-plus songs in their book. (See it here.)

It starts Tuesday, March 2 at 8 p.m. Audience members will vote via applause.

Those who win the night and the night's runner-up will be eligible to compete for a $500 grand prize at the finals on May 4.