Answer: Not like Jetsonville. Not at all.
For a show with such amazingly futuristic architecture, the lettering seen on “The Jetsons” was pretty unremarkable. It’s pretty consistent with lettering that would have been seen elsewhere in 1962, when the show premiered on television.
Maybe the creators and animators felt the lettering had to be unremarkable, so that it could be read quickly. Or maybe they didn’t want the lettering to compete with the architecture.
Here are some examples of lettering from the original “Jetsons” television series.