Its the same concept as telling racist jokes at work or something like that: it’s not allowed at all because even if the person telling and the person listening are both OK with it, in the workplace, there’s always someone else who hears. And that puts that person in a difficult position they never should be put in… ignore it to maintain good relations with co-workers? Or report it, and be a “snitch?” Even when people object to what’s going on, in a workplace, particularly a friendly one where people get along well, the pressure to conform is going to make someone feel marginalized, and that’s not something that should ever occur at a secular workplace.