Being a classroom with 32 kids and 2 adults - OK
Sat on a crowded bus/train/tube - OK
Sat in an office for 7+ hours with other people - OK

Meeting with 7 of those colleagues or friends socially - Not OK

1972 4/4 4 seater, 1981 MGB GT
1984 Harley Davidson Electra Glide, 1990 Kawasaki ZX10