Plan a watch party with friends.
A watch party runs long because the gaps are real. Breaks between episodes for refills and conversation add up, and a twenty-minute allowance for people arriving and getting settled is realistic for any group. Adding those to the pure viewing time gives an honest end time to tell guests, and the snack budget scales with headcount rather than with runtime.
Party duration
Total minutes = items x runtime + (items - 1) x break + 20 minutes of arrival and setup
Snack budget
Snack total = spend per guest x guests; cost per guest = snack total / guests
Three to four forty-five minute episodes is about the ceiling before attention fades for most groups, particularly on a weeknight. A single film plus one episode is a safer structure.
Yes — the twenty-minute allowance covers typical drift. If guests are travelling separately, starting the first item thirty minutes after the invitation time avoids replaying the opening.