UCLA student, Need help on choosing summer college in LA

<p>Can anybody tell me more about choosing summer schools in LA?
I don't want to attend my university's summer school, although it's really inexpensive for UCLA students, since that way my GPA in summer will be accumulated to my current GPA. And what's more, I can only earn the maximum credits of 18 units from UCLA's summer sessions.
Is there any college or university in LA that can offer better summer school? I mean the schools that can let me earn more credits and at the same time the GPA cannot be transfered to UCLA.
Do you guys have any ideas? Can anyone help me? Thx!!</p>