My guess is that in RL, the show's writers just wanted them to attend something "with culture and didn't think through the implications." In the show's universe, I doubt Lex would try to send any messages like that to Lois until after they were married. My guess is that that show was just the one that happened to be playing at Metropolis' grandest theatre. (The only one Lex would deign to show his face in.)
At least it wasn't "The Taming of the Shrew."
Joy,
Lynn
