Plug Sockets not working?

I am currently fixing the sound system at the bar i'm djing at. The problem we face is, at the moment there is only one duel plug socket working. This is currently used to power all the lights along the bar, 3 amplifiers, 1 pre amp, EQ, Kettle, A HD Tv, With daisy chained extension cords from one side. Then also with daisy chained extension cords, two pioneer cdj 2000's, a dim 2000, my macbook, serato box, 6 lamps, a strip light, a fan, and my iPhone on occasions. I never released until today when I ripped the amplifiers out that the only power source for all these items was one socket.

This MUST be a fire hazard?? Am I right.

There are however plenty of power sources on the walls to power these devices. but none of them work.

Is it worth just calling the electrician, or will there be a fuse that has blown causing the extra plug sockets not to work?

Any help is welcome.

Thanks