i wasn't there....was only 13! and travelling to london at that age wasn't possible
as for the venue itself they used to have the Crufts dog show there, and (i think) the national motor show - both of these events have since moved to the NEC for the reasons that queen proably didn't do earls court again...it wasn't big enough! although by queen's standards it was a big venue (about 10k), they did Madison Sq Grdn that year which dwarfs earls court.
the best way to sum up earls court is with Brian's quote from THAT GIG "thank you for giving us the opportunity to do this ridiculous place"
go deo na hÉireann