Flannys is hands down my favorite place in the valley to grab a beer, a burger, and hang out with friends at lunchtime.
I can't speak for other times of day, but it's generally quiet at lunch. They have a constantly changing beer list with something for just about everyone, and the menu is moderately eclectic for bar fare.
Yes - the staff can be a little gruff. But they are never rude, they haven't messed up anything we've ever ordered, and all the food is better than it should be.
I highly suggest stopping in, grabbing a flight of random beers and some street tacos. Always seems to work for me.