I don't generally use the mygmrs site for local info, as much of it is outdated, but can tell you:
Mt Julio on 625 is going strong. This is the "free speech" system open to anyone and is NOT a family-friendly repeater. You will be invited to leave in no uncertain terms if you ask them to cool it, or for radio checks.
The legendary Verdugo 700 System is back but undergoing countermeasures testing currently. It should be back on the air soon and will be multi-site.
The CREST System is on 675 and working. They don't encourage chit chat really.
There is a playpen of BS on Contractors Point at 650.
Plus, the assorted Spanish Speakers on 550, 575 and 725. The "LA Echo" System is supposed to be pay to play, so there is very little traffic other than the obnoxious ID'er.
The above are all high-level systems, so if you have programmed your radios properly you shouldn't have any problem lighting them up.