so they're at a party in the 80's, where just like parties happen today, there was music playing. Inside a room they played music and turned up the volume? Keep in mind that the 80's had records, 8 track tapes and cassettes for your car were a new thing because boom boxes became available. 2 different sources of music in a home blaring loud music at a party full of people. That's not weird at all "LMMFAO" says the 80's party goer! Note the average size square foot of home we would be talking about