What about something like this?
table([
[{content: "First Name", borders: [:left, :top]}, {:content => "Monday", :colspan => 2},{:content => "Tuesday and so on", :colspan => 2}, {content: 'Signatures...', rowspan: 3}],
[{content: '', borders: [:left]},'Time In', 'Time Out', 'Time In', 'Time Out'],
[{content: '(as it appears<br/> on PBF)', borders: [:left, :bottom], align: :right, inline_format: true }, 'Initials', 'Initials', 'Initials', 'Initials']
])