Darren,
I can't tell you anything about cruise nights in Lost Wages (Las Vegas) or San Deigo. In the LA area most stuff takes place on the weekends, with a few during the week. It just depends on when you're around. Take a look at this web site. It sums up a lot of what goes on.
socalcarculture
Friday nights there is a cool cruise night at Bob's Big Boy in Toluca Lake. It's near NBC Studios which is in Burbank. Some really nice cars and motorcycles show up. Maybe we can hook up if schedules mesh right.