Pasadena is not the first city you think of when looking to shop couture goth. Halloween on not, I love Gold Bug's eclectic collection of art, jewelry, clothing and other oddities. This is a great place to shop if you don't want to do a full-on costume. Just accent a black dress with with creepy, high-fashion accessories like a diamond skull broach, an octopus necklace or fur fanny pack and you're good to go.
The last time I went, I picked up a ring utilizing the workings of vintage watch. Every time I wear it, I get loads of compliments.