Most library job descriptions include the term "and other duties as assigned" and we librarians often share jokes based on real-life experiences about what that generic statement can include.
The public library system of Arapahoe County, Colorado offers a position that includes that caveat (more or less), but is based upon a core duty seldom found in library services positions: barista.
Yes, some public libraries have in-house cafes or even bars, but these are usually separated from the conventional library services end of the business. This job posting is not for a barista who works in a library, but a person who offers paraprofessional library services and makes coffee.
A master's degree in library science is not required, so it is not, strictly speaking, a librarian position. But the detailed list of job requirements includes core library services.
-via Jessamyn West