For me, Crazy Mocha is an ideal working coffee shop. The coffee is good and very affordable, there is no music that I've ever noticed or if there is, it is very low. It is also a large space with plenty of seating that never even gets half full. There is a small lot, at least one bike rack, and relatively easy street parking up along Fairmount and Roup. It isn't hip, and to me that is an advantage when meeting new clients because it is a very neutral space. There is a conference room that can be reserved upstairs that I've never used, but it seems to be almost always available (I'm in here ~2x/week)
On the negative: the bathrooms are of wildly variable cleanliness and there are very little drink options outside of coffee drinks (especially lacking in cold drink varieties).
If you want a more artsy coffee shop with music and exceptional coffee at the cost of things like parking and seating space, check out nearby Commonplace Voluto or especially Zeke's.