Huntington Beach! I drove there last summer and last month. They just opened up a brand new hotel called Shorebreak and it s literally across the street from the ocean and the pier and all the shops and restaurants. It s like the perfect location and since it s brand new it was so nice inside, and pretty reasonably priced. They upgraded us to a ocean view balcony for free just because they had empty rooms. Anyways, you guys won t be able to get into any clubs per say being that you are underage but there are TONS of sports bars on the strip that you can go hang out in and watch some sports without getting carded (you just can t get alcohol). And there s always surfers at the ocean and volleyball players. Plus it s about 45 minutes from LA/Hollywood if you want to check that out.
Well, the drinking age in California is 21. But I would go to Newport Beach in Orange County. Nice area and centrally located if you want to go to other places.