too Many to count
There are many places where one could find a copy of the Staples Center seating chart. The best place to find the Staples Center seating chart would be places like Staples.
from 50 to 100 im guessing
Approximately 19,500 people attended the memorial service for Michael Jackson. The service was held at the Staples Center in Los Angeles, CA.
I would go to Uhaul or rent-a-center to find a large van for 15 people.