UK digital copyright laws/licence for DJ's

Ok myself and a mate said we'd DJ some old funk/breaks/groovey rock stuff upstairs at a friends pub for shits n giggles using mainly MP3's/wavs on my HD2500 and his laptop however is there a remote possibility we could get stung with this if we aren't using original CD's or LP's?

http://news.bbc.co.uk/1/hi/entertainment/4609378.stm

Its not like we're getting paid cash or charging to enter the room we're playing in but is this something I should be worried about?

Never done this shit before however it is quite a busy pub at weekends located in the center of town.

If I remember correctly this law has already come into force in some other European country. Though as the guy says in the interview this'll be one heck of a job to enforce ....

Yeah don't sweat it - ain't no one gonna be messing with your shit.