What are some good places to go in San Francisco where I can lay down and chill to music on my ipod and not be disturbed?

I have a secret forest in Oakland, off skyline blvd.  In the bushes at the bus stop.  This is a forest of wonder.  It is the most secret place in the world.  It's like dropping out of reality into a forest of gnomes and magic. Just you and your imagination.  

Also, what L said and don't forget the old Cliff House.

In SF, the homeless are chillin' and poopin' in front of every restaurant.

home...................

You can stay in your home.

Try one of their public libraries.

hotels and motels

Pretty much any public park or street corner.

Define "distraction".

Ocean Beach is nice, but the beach, waves, kite surfers and the wind can be a distraction.

Delores Park is nice, but the people, and general friendly ambiance can be distracting.

Taking a seat on a bench along the Embarcadero can be nice, but the traffic noise and people walking (some with their dogs) can be distracting.

Sitting in the middle of the lawn at Crissy Field or near the Exploratorium or The Presidio or Golden Gate Park or any other park can be really nice, but even a small blade of grass or a bug crawling through the grass can be distracting...

Taking this further - and outside San Francisco: Sitting at the top of Mt. Diablo or Mt. Tamalpais or at the lookout at Pt. Reyes can be nice, but the view and the beauty can be distracting.

maybe you can go to the park