I'm afraid the 'seaside' singarounds in Roger's/Pavilion bar are one of the things long missed I liked about Sidmouth and found the York and Faulk much more suited to nightime, which also doesn't happen now. Overall I reckon Folk dos as we knew them are gone for good.   Folks seem to like Zoom. I've only sung at rare garden or woodland clearing dos. Outside. Indoor Folk venues tended to be short on ventilation. Good Luck though.