I don't know about making friends at restaurants on a Friday night. Isn't the crowd usually families, couples or established friends at restaurants on a Friday night? You might have better luck with the Reddit Beer Club meet up. It's tonight at Moniker Brewery and if it's a bust, cross the street, sit at the bar at Slow Rhode and have a fantastic dinner. I've never been to the beer club meet up, but from the pictures, the crowd might be just what you're looking for.