What can I do with two house finch nests on my patio? Some of the eggs have begun to hatch!?

I'm having 60 people over to my house this weekend for a birthday party. The two nests are in the rafters of the patio. The mothers always leave their nests when people are outside on the patio. this party will have people on the patio most of the night. If the mother birds are disturbed for the 6-8 hours this party is going on, am I putting the baby birds in jeopardy? The party is taking place at night when the birds are usually quiet. What can I do?