Although narrow, the beach is a great starting gate for serious walking since it seems to go on and on, curving out of sight around the coves. Laguna, like Venice, is more for shopping and gawking than actually lying on the sand. But it is much more classy than Venice. The main drag in Laguna is a collection of fine arts and eats. It attracts far more visitors than the beach.
Street parking is almost impossible.
Here is where it really makes sense to park inland and hoof it. And that is probably the best idea anyhow, because from there you can walk the town. Tourists flock to the art galleries, craft shops and pottery makers, especially if there is any art festival going on. Crescent Bay on the north side of town is good for body surfing. Seal Rock is where elephant seals and California sea lions often sun themselves and occasionally swim with divers.