Over the sound of a country crooner praising Jose Cuervo tequila, Julie Kaufmann encourages her class of line dancers with some pointed advice. “This will help those neurons fire and prevent cognitive decline,” she says, explaining that following steps in sequence will keep their memory sharp. For those with knee, hip or balance issues she offers an alternative to the grapevine, a move where dancers cross one foot in front of the other. “You are ageing gracefully!” she calls out to the room, filled with giddy older adults spinning around in orthotic sneakers.