Very few processes - for example there is no annual employee performance review. This works to your advantage if your 'in' with your boss. For the folks in Sales and Engineering the goals seems pretty clear but the rest of the team is left in the dark. And without written goals, you could find yourself out of a job for not meeting goals, which is hard to do what are the goals and when they are due.
CEO is heavily involved all levels of the organization, above and beyond what one would expect in a small company with an employee count under 200. This can make it very challenging for any manager. This has led a culture of 'yes' men and women.
Heavy duty drinking culture - if you don't drink, you will not be in the clique and we are not just talking Sales folks chugging beers. If you manager drinks there is an unwritten expectation to show up at the bar after 4 and continue working from there.
There are no all hands company meetings. News gets filtered down via Slack channels or from meetings w/ managers. Slack is the primary communication method.