There are hints about the events on the phone. Click the "Side" tab in the notes to get hints for secondary events.
You are looking at the wrong one. The hint for Level 2 is "Wednesday Evening at Gym and have $15. Also, any Level 3 event for Ash must be completed.” Just the 5$ is for the workout after the Level 2 event that includes the scene. It takes place at the same place and time as the event, which is why it's not specified.