My company has a culture in which we all swear like pirates. This makes this whole question moot. Even the softly spoken polite types end up sounding like they were raised in the gutter by the end of week two.

Additionally, swearing is a social signal that typically bonds people, as it's a "we can say these things together" type affair.

We swear in front of and with clients (not all - there are some where we know it would be a lead balloon). We talk like human fucking beings. Folks tend to find this refreshing, and it results in a more relaxed atmosphere, and more relaxed interpersonal and client relationships.

Franky, if someone is offended by my language, then I see that as strictly their problem, and I won't apologise for it.