Last time I went through a series of interview to find a new job, I systematically asked to go to the bathroom. I believe male's toilet cleanliness is a good indicator of how employees perceive their workplaces. Said simply, if it's not clean then I expect employees to give poor considerations to each other or to the work they produce. You can be fooled by what recruiters tell you in the interviewing room, the perks they offer (free food, ping-pong etc.) but I think a company always show signs it can't control while you're in their precinct.