1 pierrepont plaza also houses morgan stanley and the federal prosecutor 's office .
hillary 's campaign will occupy two full floors in the brooklyn heights neighborhood .
upscale hipster neighborhood includes urban outfitters , banana republic , shake shack and a private squash club .
` i guess we can expect all the clinton campaign t-shirts to have ironic slogans , right ? ' said a gop senate staffer .
campaign has just 15 days to declare itself in the white house hunt after taking a formal step like committing to office space .