The context of the following conversation is Jan and their partner were going to a big new year's party at a bar downtown. Jan decided to leave the car keys at home and take a taxi.:
Jan says We went to a New Year's party downtown for my husband's job..
The friend responds That sounds fancy. What all did you guys do?.
Jan responds It was fancy. But it was boring. His work friends always bore me so I just end up drinking a lot so we just took a taxi there and back and didn't even try and drive..
The friend responds That was probably a smart idea..
Jan responds I could have been the designated driver, but then my night would have been ruined. So I just left my keys at home..
The friend responds Smart. Because then you couldn't even drive if you wanted to when your judgment was impaired..