I visited their NYC offices in 2008. we were talking to them about some openstack/cloud stuff at the time. I went in jeans and a polo. My contact there emailed

I visited their NYC offices in 2008. we were talking to them about some openstack/cloud stuff at the time. I went in jeans and a polo. My contact there emailed after saying the meeting went well, but to please wear a dress shirt and no jeans next time. And I wasn't even an employee! ;)