I think your best bet is the Santa Monica Pier.
You could try Little Tokyo and the The Glendale Galleria / Americana @ Brand in Glendale. The Third Street Promendae in Santa Monica dies down after business hours (9pm/10pm) so you could try your luck if you like. Abbott Kinney Road in Venice often closes the street off for a food truck festival and it's kind of neat to wander the streets and shops/restaurants car-free.
Other places off the top of my head:
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http://www.downtownla.com/
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The Americana at Brand
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Universal CityWalk Hollywood Los Angeles, California
Just keep in mind these places have regular business hours i.e. 9am to 9pm. If you're looking for a centralized club/nightlife district, there isn't exactly one that's similar to Granville Street. You could try West Hollywood, but I don't know of any exact locations. You'll have to Google that one.