Jim,
If you have a "home course", I'd highly recommend a visit during a rainstorm
You will learn a lot.
Otherwise, I have walked many golf courses when the greens/course in general is surface draining and it is amazing what you can learn.
As far as "some alternative" way to learn to read greens, look to where they drain. You can figure this out from the grass, the surrounds, the color,...etc.
Once you figure it out it would help you reading putts.
Mark