Let's say, hypothetically...

Let's say hypothetically that you have a martial arts class at 7:15 on Monday nights. And
Let's say hypothetically that you left work early and had some time to kill. And
Let's say hypothetically that you went to The Grind coffeehouse to try an go over last weeks notes on the Ed Bus Screenplay to hopefully streamline tomorrow night's meeting. And
Let's say hypothetically it smelled like hipster b.o. And
Let's say hypothetically a woman sat down next to you and started making chit-chat. And
Let's say hypothetically that since you consider yourself to be a polite person you engaged in an observation with her to validate her conversational salvo. And
Let's say hypothetically she continued into a second conversation starter about how much she likes Cab Calloway, thinking my response indicated I wanted to continue to converse with her. And
Let's say hypothetically she just moved onto topic three.
How would you tell her to fuck off?