Why would anyone want to work for Twitter? Or Facebook? Or Google?
Well, how about an onsite gym, with yoga and fitness classes? A laundry service? Subsidized massages? Dry cleaning and free laundry machines? Weekly lectures from industry heavyweights? A Zen room? Catered breakfast and lunch? Paternity leave? Medical and retirement benefits? Reimbursements and stipends? Games rooms and activities? 20% personal project time per month?
A rock climbing wall?