I stop at this branch of Barriques pretty regularly. The tea is fantastic (I'm not a coffee drinker) and I love the food. If I'm just looking for a snack, the hummus plate is one of my favorites, but the sandwiches, soups and pastries are also quite good.
There are tables, comfy chairs and a couch to choose from. The fireplace is clearly popular based on other reviews; so it might be difficult to find a spot near it. I've never noticed it too loud; people are usually working, studying or having intimate conversations. I've seen small groups there holding what appeared to be planning sessions, or knitting together. What's not to like about that kind of atmosphere? I would say that the location isn't very large, so while they can accommodate groups, I'd keep it small.
The staff are fantastic. I've never had any problems in that area - even when out with folks who have food restrictions.
While I have a few favorite places to stop for tea, this is nearly always my first choice for meeting friends in Madison after work.