The Southern California Summer Pro League is a staple of summer basketball for the last 30+ years. Each year rookies from 5+ NBA teams and various free agents, tryouts etc. take their shot at the NBA.
The action is enjoyable and the desires of some of these players, who are not guaranteed NBA-money until their big break, is palpable. The star sighting is also entertaining.
The league operates in early July and tickets are $12 for a da (5 games), so plan on spending some time there.