In chapter 8 our book states that handling workplace romance is complicated and that nowadays attitudes toward that are more relaxed. In my experience I think it depends on the level of the chain of command that you are on. In my work there are no executives allowed to have a significant other working in the same store. Nor are they allowed to socialize with regular employees outside of work. It makes sense because of the position that they hold.
Its funny though that when you are a regular employee, a group of guys that works with eachother every night, and a new female employee starts working, the guys tend to dare eachother to go and talk to the girl and see if they can get them to go out with them. This goes on for a few weeks in hopes of the girl to respond positively and eventually consider going out with one of them. Nobody really seems to care about regular employees having a relationship but when it comes to other positions, ones with more status, it is agains the rules and enforced more.
I guess its different for each workplace or company. I guess it depends on whether or not the company wants to maintain an image or reputation. I guess a workplace can't have everybody dating eachother and then breaking up and having cranky employees bringing their drama to work. I've seen people transferred, not fired, but transferred to another store because of it.