It is highly likely that you WILL be towed if you park illegally - seatbelt citations are issued routinely - also jaywalking - cameras snap your license plate at random intersections if you have a violated a traffic signal - if you have rented a car the price of the ticket will be charged to your visa.
Driving while under the influence of alcohol or drugs is a serious offense in California. A person is considered legally drunk when his or her blood alcohol level reaches .08%. It is illegal for anyone less than 21 years old to consume alcohol in any quantity at any time in California. Tourist or not - if the Beverly Hills police observe you exiting a club or restaurant and believe you have been drinking they will stop you as you drive away and give you a rigorous alcohol test right there on the street. If you fail, you have an annoying problem to resolve.
First, the background: Under legislation signed by California Gov. Arnold Schwarzenegger, drivers of the highest gas mileage hybrids -- only certain hybrid Toyotas and Hondas -- can now use California carpool lanes on the freeway even if the driver is alone. If you try using those lanes alone in your Escalade, or even your Jetta and you are alone in your car, you'll get pulled over by a cop on a motorcycle, and the minimum fine is $271.00 - added to your credit card by the rental company if you are driving a rented vehicle.