"Folk" in the UK seems to be very narrowly defined (let's not start), and "folk dance" appears to refer only to morris and what we'd call 'English country dance'. In the US, both folk music and dance derive from multiple backgrounds and the term has a much broader meaning.

For example, here in Albuquerque, New Mexico, there are stage performances of Galician piping, bluegrass, balladeers and singer-songwriters in the next few weeks, Celtic (and the term is used very broadly) jams, international folk dance and contra dance and at least two sing-arounds. On the other hand, to the best of my knowledge, there are no bars/pubs offering floor singing, if I understand what's meant by the term.