Final answer:
Cassio dines with Iago on the night he is stabbed, as part of Iago's manipulative schemes in Shakespeare's Othello.
Step-by-step explanation:
On the night that Cassio is stabbed, he dines with Iago. Iago is the person who orchestrates Cassio's downfall throughout the play Othello, by William Shakespeare. Iago manipulates events and individuals, including Cassio, to create chaos and to further his own scheming ambitions. The dinner is part of Iago's complex plan to discredit Cassio in the eyes of Othello and thus, the act of Cassio being stabbed occurs after Iago has cunningly set the stage for the altercation that leads to the stabbing.