Possible Clues:

• Lonely end to the working week, going on for ever
• Socially isolated, not stopping at the end of the day
• Saturday never comes without supporters
• The weekend never arrives when lonely
• Socially alone
• Send lifers to stir for solitary
• Alone? Sat waiting then?
• Presumably Saturday never comes for such as Billy-No- Mates
• Friday, finish at Leslie's alone
• Unpopular day, interminable