It depends on company. When I was working in market research organization nobody ever was looking if you come in time and work 9 hours or not - if your job is done prior to dedline you are good worker. Contrary, in the international airport's IT division rules were really strict - total amount of breaks per day couldn't be more than one hour including lunch.
In general don't chose companies which are expected to work without errors - like airports, police, 911, government agencies and so on, any role there an be limited with tons of instructions and rules, even in back office.
I had most positive experience in scientific organizations (not in US though, here they are very different and much less organized), back offices of retail companies and market researchers - style of management was much more liberal. I can't say any company name because not likely it will help you - they are operating mainly in Central Europe and Russia.