It's a part "pay-to-play" co-working space and part free co-working space. It's housed in what seems to be an old theatre and retains a lot of the charm. Blue Bottle coffee is inside.
Regardless of whether you decide to pay or not, there's plenty of places to sit. The free section has an outdoor patio with tons of tables. Tons. It's hopping and there are a ton of people out there playing chess, reading, working etc. Inside the free area, there are fewer spaces, however one or two people shouldn't have an issue finding a place to sit.
The paid space is nicer, a little less crowded. However, it's $3 per hour minimum to pull up to a table and work. There are tons of seats inside. Some standing bars, some community tables, some couch style places. If you pay more, you can get a spot all to yourself with a whiteboard. If you pay a little more than that, you can get a spot with more privacy, whiteboards, and a video display. There are also rooms that are completely private that seat what seems to be 8-10 people. One looks like it has it's own espresso machine in it. Don't know if it's for the room or what.
In the paid area, you could pull off a conference call or Skype chat. It'll be a tad noisy if you're in the more public spots. If it's an important call, might want to rent a private area for an hour while you chat. If it's a brainstorming style thing, not a problem.
If you have any computer issues, there's an Apple store right down the street. If you're looking to work in the paid spot, be sure to visit their website and register for an account ahead of time, so you can be guaranteed a spot.