You probably will not get a discount because at least at my local theater the price to see the 3D version is the same as seeing a non-3D movie and the glasses are just a freebie and not part of the ticket price.
As for the movie, Bolt, it does seem somewhat interesting, but I think I will wait for it to come on dvd to see it.
Here, the ticket price was higher for our last 3-D, than the other movies, which led me to believe we paid for 3-D glasses with the ticket price.