Berkeley is ranked #3, which is no surprise. (But Pacifica?! Wow, I never woulda guessed). Business Insider via Movato explains:

This East Bay gem has plenty to offer excitement seekers of all hair lengths.

Of course, with UC Berkeley in town, the 18 to 34 group is going to be plenty large; it sits at 43 percent, to be exact. Plus, with it being part of the notoriously health conscious Bay Area, a sixth place finish for active life options isn’t unexpected (there are parks and yoga places everywhere). What you might not be expecting, though, is that this seemingly laid back suburb has a lot of nightlife.

From bars such as Jupiter and the Albatross, to world-renowned venues like the Greek Theatre, it’s a fantastic town to hang out with friends after dark or take in an A-list act

The big-ticket sales were concentrated in the South Bay, Peninsula and San Francisco, where companies such as Google and Facebook were sending waves of newly minted millionaires out searching for their dream homes, which were in short supply. Bidding wars pushed high prices even higher.

Courtesy Bernard Andre -- This home on Park Lane in Atherton sold for $30,300,000

Median rents for one-bedroom apartments by neighborhood in San Francisco (Zumper).

The apartment rental startup Zumper has updated its maps of the median rents for one and two bedroom apartments in San Francisco by neighborhood. It found that the median price for a one-bedroom in the city is now $2,764. The median price for a two-bedroom is $4,000.
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The median is the numerical value separating the higher half of a data set from the lower half.

In San Francisco, these rates vary substantially depending on which part of town you're looking in. Much like its notorious micro-climates, the city features micro-pockets of relatively affordable rental units.

For example, here are the three most expensive neighborhoods to rent a one-bedroom:

South Beach - $3500
Russian Hill - $3410
Financial District - $3350

And here are the three least expensive neighborhoods to rent a one-bedroom:

Outer Richmond - $1850
Outer Sunset - $1975
Inner Richmond - $2015

As for the three most expensive neighborhoods to rent a two-bedroom:

Financial District - $5800
Marina - $5450
Cow Hollow - $5400

And the three least expensive neighborhoods to rent a two-bedroom:

Outer Mission/Excelsior - $2460
Outer Sunset - $2525
Lakeshore - $2640

Zumper Co-Founder & CEO Anthemos Georgiades explained the methodology the company uses to construct these maps:

• "We use medians for the average prices to discount outlier listings and so as to not over/understate the real prices."
• "These May 2013 asking rents are perhaps different to what some readers may currently be paying if they rented a few years ago or if they are still paying rent- controlled prices. However, these are the current prevailing prices for available apartments on the market today."
• "Most units on the market tend to be newer (read: non-rent controlled) developments built post-1979, since they experience more turnover. These units are often renovated with many more amenities than their rent-controlled counterparts, making them more expensive."

As for the "least expensive" neighborhoods on the list, this too is a relative matter, especially for low-income families. Earlier this year, the National Low Income Housing Coalition reported that San Francisco is thesecond least affordable rental market among all U.S.cities, after Honolulu.

The rental situation is driving some of those seeking apartments to take extreme measures to enhance their chances.

"Renting to own is also a way to get into a desired neighborhood in a timely matter, as with parents who need to be in school district for their kids, or people who are uncertain of their timeline, according to San Francisco real estate professional Herman Chan. "It's a way to get into a house without committing to a 30 year mortgage," he said."