From my inbox (Google map link):
Welcome to the 1st annual event of the StartUp Crawl.
Yammer is eager to open our doors to meet you. We have some great giveaways and will be having a raffle every 30 minutes. We’ll be serving Mexican Food from 5:30 – 8:30 but will have Beer and Margaritas all night. If it’s chilly outside, be sure to come by we’ll have a coffee cart serving all your favorite hot drinks.
If you would like to meet our executive staff, they’ll be here until 7:00.
If you are taking CalTrain, I suggest making Yammer your 1st stop, we’re a block from the station.
We are actively hiring Ruby on Rails engineers as well as other positions. If you’re interested in joining our team please visit our jobs site. http://jobs.yammer.com/