Headquarters for Weasel Analysis is a corner brown-shingle in North Berkeley. A visitor is advised to go through a side gate into a compound where a sign says "Hippies use back door." It leads through the kitchen to the dining room, where hippie entertainer Wavy Gravy sits at the head of the table.

Q:What is Weasel Analysis?

A: It's just something to bend your brain, instead of the normal dopey answering-service stuff.

Q: So there are no weasels here?

A: No. This is the Hog Farm. We have this 11-bedroom "Hippie Hyannisport." This is an extended family that I have been party to for almost 30 years.

Q:What is the name on your birth certificate?

A: Hugh Nanton Romney

Q:What is your date of birth?

A: May 15, 1936. People ask me my sign, and I say, "Slippery when wet."

Q:What are your birthday plans?

A: I use my birthday as an excuse to get people together to raise funds for the Seva Foundation. I'm doing two shows; one is a dance May 14 at the Craneway Pavilion in the Richmond Marina. I understand they also have the Oakland (East Bay) Symphony there and roller derby, but not at the same time, although I would pay money for that.

Q:Who is playing at the dance?

A: Bob Weir and Mickey Hart, Chris Robinson from the Black Crowes, and, of course Barry "the Fish" Melton. He's also my lawyer. Gotten me out of jail several times.

Q:What about the other party?

A: The second one is a very stylish sit-down concert at the Beacon Theatre in New York, where Martin Scorsese shot the Rolling Stones. That is May 27.

Q: Who is playing the New York show?

A: Dr. John, Jackson Browne, Steve Earle, David Crosby, Graham Nash.

Q: How did you get these acts?

A: They're all friends of mine. They sing my song "Basic Human Needs," which is going to be released as a single to benefit Seva.

Q:What is Seva?

A: Seva is a Sanskrit word that means "service to mankind." We work to cure preventable blindness in Third World countries and in Native American health care.

Q:What is your best line uttered in public?

A: "The party that we have in mind is breakfast in bed for 400,000" was picked by Entertainment Weekly as one of the top entertainment lines of the 20th century.

Q:How did you come up with it?

A: It just bubbled up and jumped off my tongue. I was merely trying to get granola into Dixie cups to people enmeshed in their sleeping bags at the first Woodstock concert.

Q:Where did you grow up?

A: Princeton, N.J., where as a 5-year-old I was put out in the yard for my daily airing. Albert Einstein walked by and asked my mom if he could take me around the block. I got to go around the block several times a week with Albert Einstein.

Q:What did your dad do?

A: He was an architect. He did the children's wing at the Metropolitan Museum in New York City and the kitchen at Camp Winnarainbow.

Q: Is that the Hog Farm summer home?

A: It is 700 acres up north (Mendocino County), where I do a circus and performing arts camp that I run with my wife, Jahanara.

Q: Is that her real name?

A: She was an actress and Playboy bunny named Bonnie Beecher. I wandered into the restaurant she ran on Sunset Boulevard. She put peanuts in my hamburger, and I fell in love. That was over 40 years ago.

Q:How did you become Wavy Gravy?

A: After Woodstock we went to the Texas Pop Festival. I was laying on the free stage and I felt this hand on my shoulder. I looked up and it was B.B. King. He said, "You Wavy Gravy?" and I said, "Yes, sir."

Q:What would surprise people to know about you?

A: That I was a teenage beatnik.

Q:That's a surprise?

A: Maybe not.

Q:Describe your hairdo?

A: Reverse Mohawk.

Wavy Gravy's 75th Birthday Boogie: 7 p.m. May 14. Craneway Pavilion, Richmond. $45, VIP $250. www.seva.org.