Belfast Duck
longways duple proper. 
Step-hop (vigorous) or slow walk (gentle). Easy.
16-bar hornpipes

A: Circle left in fours, 8 steps; circle right.

B: Take inside hands and lead down room 2 slow walking steps 
   (easiest if you start on the outside foot); 
   take both hands and do 2 chassays (sidesteps) down. 
   Ditto up the room. Ditto down the room. 
    Ditto up the room with 1s making an arch and 2s passing under.

            summary of B:
                  down 2, chassay 2, up 2, chassay 2
       down 2, chassay 2, ones arch and second couple goes under..

Tendency for whole set to move down the room