There were several other recurring mentions of real places in classic Looney Tunes. Cucamonga, Perth Amboy, the Coachella Valley (and the carrot festival therein), Pismo Beach (“Since when is Pismo Beach inside a cave?!”), and of course Albuquerque, where Bugs repeatedly missed an obvious left turn (once landing him and Daffy in the Himalayas).
I think the writers chose places like the Tar Pits not only for their funny names, but also to play Bugs as a bit of a rube (he is from the country, after all), who gets hopelessly lost while trying to locate a classic tourist spot.
ETA
