my 1'st was in 1967[or so]. i was commuting ,iad-sfo every week, it was a slow time for business [& for 1'st class] the cost to upgrade from full fare coach [ there wasn't any other fare ] was $ 15. i treated myself one friday. the seats were comfortable, the drinks were free & i enjoyed it. however, i concluded that paying $3/ hour wasn't a good value, & didn't do it again during that period.