The Venue in Victoria London,in the 80's we used to sneak in through the fire exit & ladies toilets to see concerts for free.also the Lyceum in the strand, my mate worked there and used to let us in through Fire doors.i presume CCTV and modern alarm systems have stopped all this now.once we had to hide in the ladies toilets, as we were inside the venue ages before it opened to the public,taking shelter in the cubicle me and my mate became aware of the Ladies becoming rather busy when the venue was opened!! we had to brave it and both calmy walked out of the cubicle together!!!! it didnt look good !!!