The other girls, however, are harder to get 1005 with.
When you go inside the establishment, you'll see a short cut scene.
The progress needed for sex after a successful date will be canceled as soon as all oysters are collected, after a successful date they always wanna have sex despite the progress.
And when you killed Helena, Michelle, Katie or Barbara by accident or if one of these ladies have dumped CJ than they can be found at their meeting point, but only if CJ owns all 50 oysters.
You can practice dancing by walking into the disco when you are not on a date.
This is the same as when you are on a date, but not with your girlfriend.
When you are dancing you have to get a minimum number of points to satisfy your girlfriend.