 Have you signed up yet for free lunch Friday? It's your chance to win a delicious lunch at Silver Diner, and we pick up the tab. Do it today because we could be calling out your name as one of three winners each and every Friday. Sign up at WTOP.com, search free lunch, and join us in the noon hour on Fridays to hear that week's winner. Free lunch Friday, three winners each Friday from WTOP and Silver Diner.