Anecdotally as somebody sitting on the east coast in a start-up's office right now, everyone in this room is wearing a t-shirt with jeans/shorts. I see some fli

Anecdotally as somebody sitting on the east coast in a start-up's office right now, everyone in this room is wearing a t-shirt with jeans/shorts. I see some flip flops peeking out here and there too. I think it's more of a Start-up vs. Corporate office attire. SpaceX's culture is more Fresh Silicon Valley Startup than it is corporate. And of course there is a huge concentration of Start-ups on the west coast.