This is probably my favorite place to work in the Dallas area. It's cozy, open relatively late, has reliable WiFi, and caters to the nearby student population at SMU. They've got great food and drinks, but is also within walking distance from a bunch of restaurants and bars (Torchy's, Twisted Root, etc.). Private rooms are available for collaborative sessions. Parking isn't too bad, but can get crowded during peak hours. Special events are hosted regularly, and there is definitely a strong "community" vibe here.
There are a lot of styles of seating here, which I really appreciate - couches with coffee and end tables, regular tables and chairs, desk-like seating, high tables with bar stools, and even a Moroccan-style raised platform where you sit on pillows at a low table. It's like having the option of many different workspaces in one.
This coffee shop is also part of a co-working network in Dallas, so there are a few larger conference rooms with large TVs for presentations.
I find parking to be pretty challenging at peak times; it's near a highway, so it's not very easy to park farther and walk to this location. But, maybe there's a lot somewhere that I don't know about!