I'm keeping scores. Could connoisseurs of this refreshing non-alcoholic beverage please add their findings below.

DINGWALLS, Camden, London - FREE (probably not their usual deal)
THE HIGHBURY BARN, Highbury (dur), London - 30p
THE ALWYN, Highbury, London - 30p
THE BARFLY, 'Camden', London - 30p
MONTO WATER RATS, King's X, London - £1.50
ULU, ermmm central, London - £1.50
THE WINDMILL, Brixton, London - £2.00
THE QUEEN'S HOTEL, Brighton - £2.60