"Anyone with any sort of dignity and respect for people will avoid this place like a plague," one said.
"Disgusting!" another agreed.
According to local news outlet Click2Houston, the manager was fired by Subway immediately.
"The franchise owner has reached out to the young woman who applied for the position to apologise and encourage her to consider reapplying," Click2Houston were told in a statement.
"The former manager's actions do not reflect the openness and values shown by Subway franchise owners and their staff."