Do you have enough seats for everyone?
154 seats for 150 people — 4 spare seats. Enough chairs by headcount. Now check the actual guest assignment. Available seats = guest tables × seats per guest table + other available seats. This does not say whether the tables fit the room.
Default result
154 seats for 150 people — 4 spare seats.
The chair count is sufficient. The next check is whether households and seating wishes fit those tables.
Why a chart can still fail
Three intact families of five cannot fit at two eight-seat tables. There are sixteen chairs, but two families would need ten seats at one table. See that proof · Count the tables
Start with my guest list — free
About 10 minutes. Software, not a waitlist — your chart tonight.