As 'poll fever' comes to an end, Rock fever has taken New Delhi by storm. Louis Bertignac, a French guitarist, performed at the F Bar and Lounge of the Asoka hotel on Tuesday. Bertignac enthralled an audience comprising of both Indian's and foreigners. Bertignac was a guitarist with the legendary French rock group 'Telephone'. The band split in 1986, after which Bertignac launched his solo career.