Incidentally.... a few "extras" this system is capable of:
Credit card processing: If you have a broadband (cable/dsl) connection, transactions run in the 3-5 second range. Thermal printers make ticket/receipt printing very fast... as fast as cash. However, you can also use dialup access, though I imagine that might be a little slower... maybe not a lot, though. I've seen it done.
Internet ticketing: Customer purchases are directly processed by your system. Your seats are actually sold when the transaction is completed. Works very well.
Pickup Window: This isn't for everyone. However, if you have a back kitchen, you can set the system up to transmit food orders directly to their own terminal (no extra charge for this). Being a drive-in, this was a huge plus for us.
Gift Cards: You can have plastic cards made up with your logo. They have the magnetic stripe on the back, which has the card's serial number on it. You can apply money, passes and concession "reward points" to the card. You can also sell & recharge them from your web site (easiest if you have credit card processing).
The system will work with as few as one terminal. We have 9 active ones here, as well as several "freebies" that we use for monitoring purposes around the place. Only stations that complete a sales transaction need be licensed.