Build the full running order
Add time for arrivals, starting playback, moving between films, and a break people can actually use. A sample evening starting at 6:30 with an 85-minute first film, a 25-minute break and a 90-minute second film ends at 9:50. That is three hours and twenty minutes if the first film starts on time.
Invite people to one film or both
Name the two titles, expected start times, and which guests can leave or arrive during the break. A guest who can only stay until eight can attend the first film without wondering whether an early departure will disturb the second. Check access features for each film separately.
Decide what happens if the first half slips
Pick a break long enough for food, conversation, and a decision about continuing. For example, two 90-minute films and a 20-minute break already take three hours and twenty minutes before setup. If the first film starts late, offer the second on another date. Confirm the group still wants a double feature rather than pressing on because both titles were announced.
If dinner pushes the first film twenty minutes later, tell second-film guests the new time. A later finish may no longer work for some viewers. Offer to show the second title another day or let the remaining group decide without treating the changed schedule as a commitment everyone must keep.