OpenTable’s weekly Spotlight offers begin tonight at 8PM EST in Boston and New York. You can purchase $50 worth of food and beverages for just $25 at two top restaurants. Still under wraps, we’ve put together a few clues to help you figure out which restaurants are participating. Share your best guesses here or over on our Boston and New York Spotlight message boards. And, remember to set your alert so you don’t miss out on this week’s offers. Quantities and time are limited!