Simon Lovell has a video called "The Dog-Eared Deck" that covers just this situation. It's not his best stuff, but hey. One thing I got from it that I remembered kept popping up in magic books I read as a kid which I totally ignored was this stunt (which has since proven far more effective than I ever imagined):
Show the four queens and talk about how they are snobs and will only date their own kind (I tell folks that they are from West Virginia and will only date their own family, but then that's me.) Force any spade from the remainder of the deck and table it face down to the left (your left) of the queens. I don't remember if this was on the Lovell tape, but I position the Queen of Spades third from the face and Elmsley count, pointing out that the snobby queens are facing away from the tabled card and not even looking at it. You're pointing at the heads drawn on the queens, closest to you and at the top of the card from the audience's view. They are indeed looking to the right, and thanks to the EC they all are looking the same way. Wave the tabled face down card over the queens and talk about how Cupid's arrow has been flung. Drop the card to the left of the queens again and show them one at a time. The last card, the Queen of Spades, will now be looking towards the left, directly at the tabled card. Aha! This means it's a spade. You can then slide the queen of spades face up under the tabled card, then have her whisper in your ear the identity of which spade it is (since you forced the booger.) People poke and prod and twist at the queen, thinking that you somehow caused it's head to twist around, even though the slightest bit of common sense should tell them otherwise. It's one of those all out of proportion for the work involved things.