Even if we assume the biblical account of the marriage at Cana is true, we don't know much that would let us answer this question.

The word used for servants in John 2:5, διακόνοις, means servant or attendant. That doesn't give us much information on the status of the people; honestly I'm not even sure if we can parse whether they're hired help or enslaved labor, or whether the word could be used for either in this context.

Likewise, we don't know much about the people in attendance at the wedding, i.e. the people they serve, other than that they're most likely Jewish. It appears to be a moderately prosperous affair, but the account doesn't give us many details.

It would also help to know more about Cana, but the wedding is the town's only claim to fame. Given the narrative arc of John's gospel, which is our primary source for this account, we assume Cana is somewhere in Galilee, but we don't even know if that's true, although several archaeological sites have been suggested.