I've never been a huge fan of chain restaurants, but this is one place that my girlfriend and I can agree on. They have a pretty good menu, food is served in a good time frame, they have bottomless drinks and bottomless steak fries. Here's a tip with the steak fries, dip them in Campfire Sauce... so good!
When we go, I prefer to sit in the bar area because it's a little bit quieter and we usually have a good waiter, Joey. Red Robin is a little more expensive than your typical chain restaurant, but I find it to be quite reasonable for the quality of food and service.
Typically I would give a chain restaurant like this three stars, but as long as they keep it up, they deserve four stars in my book.
As a sidenote for those of you with food allergies or gluten-free needs; my friends have raved about how Red Robin has gone out of their way to prep food in a separate area from the main prep line so those with allergies don't risk having their food contaminated by the things they're allergic to.