This sign, from Burton Barr Library in Arizona is helpful for me. I like that it does not expect me to understand what fiction is, but lets me know some of the kind of reading I might find in this area.
I think there is a sense of excitement from the kind of sign as well. The lit sign (and I know this is not feasible for every library, not would it work in every library) adds to the sense of wonder, discovery and interest.
I am guessing it took a while to work out the exact working (what genres get mentioned and in what order), but this sign does what it needs to do, shows where I can find some reading.