Sorry it just occurred to me I should put up the expression:
var pickup = $feature.WEEKDAY;
When(pickup == 'OUT OF BOUNDS', 'Not Available',
pickup == 'TOWN OF LONGBOAT KEY', 'Not Available',
pickup == 'CITY OF SARASOTA', 'Not Available',
pickup == 'CITY OF VENICE', 'Not Available',
pickup == 'CITY OF NORTH PORT', 'Not Available', Proper(pickup));
The popup title is then:
Pickup On - {experssion/expr0}
as {$feature.Weekday} has become {expression/expr0}