THe link to last year's SF Gate article describes Portuguese Festas much better than I could (since I haven't attended one).
A Portuguese specialty, sopas is served at these festas (and other food). The SF Gate article says. I think, of the Mountain View festa
"teams of helpers cook up as many as 18 donated cows in 37-odd steel pots.
The orderly and convivial crowds file into the hall, where they are served unlimited helpings of the beef, stewed in wine and the association's patented blend of spices, with sops of bread softened and pleasantly soggy in the gravy. Then there are concerts and staid couples step out to do the Portuguese quickstep on the dance floor."
Many of the Holy Spirit Festas take place this weekend. This link which is a bit confusing lists them. Find your area and then scroll down to 6/15/05.
Be sure to check if sopas are served. The HMB festa is not serving sopas (bummer, that's were I was planning to go).
Some festars are later. I was interested in the San Jose festa, but it seems to be on 5/30 with little info.
Besides Mountain View other festas this weekend with sopas (and I didn't look everywhere since I'm thinking Mountain View for me) are Santa Clara and Hollister.
Don't know if food is involved in Sausalito, Hayward, Livermore and Vallejo. You could always call the Churches to verify.
I'm interested in the Montery Festa which is supposed to be one of the larger ones (and not related to the Holy Ghost). However, the site is confusing.
Also Portuguese Day is coming up in June in San Jose with lots of food.
Also, click on the pictures in the article for a feel of a Portuguese festa. I want to see if people really do wear bread hats.