As long as you can recoup the 12 bucks to get in its worth it to go and look around. I save that on buying my oil for the year, so yeah its worth it to me. Besides I can spend 3-4 hours just walking around and checking stuff out and looking at all the machines.
Or, look at it as being about the same cost for 2 people to go there for a couple of hours as a movie make your decision based on that.
If only they had one of those misting machines you could walk through as your leaving so you could smell like 2 stroke oil when you are done...