Othello
What is Cassio’s response to Iago’s invitation to drink? What does it indicate about Cassio?
Act two Scene three
Act two Scene three
"Not tonight, good Iago. I have very poor and unhappy brains for drinking. I could well wish courtesy would invent some other custom of entertainment."
Cassio is well aware of his inability to handle his liquor..... he'd be just as happy doing something else.
Othello