Lucky D’s is a fun, international hostel in the heart of San Diego’s Gaslamp Quarter. It’s next to a lot of nightlife, not too far from the trolley, and is full of friendly staff (props to Naomi at the front desk!).
That said, don’t expect to get a lot of sleep in the Hostel- I was on the 4th Floor and could hear everything going on in the bar on the street level, made for some shorter nights than expected.