oi. you're going to be here during the winter and things will slow down during this time. if there's a specific type of show you are interested in, for example a lowrider show then your best bet would be visiting websites associated with that car culture. do a google search for forums, for example "lowrider forums" or "hotrod forums". You might be able to find websites that cater to these hobbies and there will have to be areas where meetings and/or shows will be announced. i used to attend nissan meetings in southern california and found these meetings slow down during winters because it gets too cold to be out at night, or even rain cancels things. again, visit websites associated to the type of car culture you like to find any activities. if you're into nissan you can try 240sxone, nicoclub, zilvia, etc. I visit zilvia regularly and they do have sections where events are announced. Boa sorte e bem vindo a o California.