Someone was telling me that their local club had started serving a special Guinness from cans. They dont sell enough to get draught in and the draught in cans didn't sell well but this new method involves pouring from a special can and then standing the glass on a special plate and passing an electrical charge through it causing the head to form. Has anyone had experience of this and if its any good. I found the following on Wikipedia:
In March 2006, Guinness introduced the "surger" in Britain. The surger is a plate-like electrical device meant for the home. It sends ultrasonic waves through a Guinness-filled pint glass to recreate the beer's "surge and settle" effect. The device works in conjunction with special cans of surger-ready Guinness.