public drinking

Can anyone tell me the law in San Francisco regarding public consumption of
alcohol?

Interesting article
here<http://www.boston.com/news/local/new_hampshire/articles/2005/08/15/nh_town_is_drinking_in_peace/>about
a NH town that just did away with laws regarding public consumption of
alcohol.
I love this quotation: ''People should be able to have a drink and
socialize, and the assumption should not be that they are irresponsible,"
said Jane Lyman.......