Usually there isn't a spectator area per se, but spectators are always welcome. Most people are very excited to answer questions about their game of choice, strategy, what to buy to get in to the game, etc. Trust me, I'm well aware of how intimidating it is to walk in somewhere you haven't been before for a game you may not have played before, but once you mention you're new and interested, you'll be amazed at how welcome most people will make you feel. Most game stores also have demo sets of whatever game you're watching so you can test drive before you buy.
