According to Baekhyun & Chen, here are the members' role if the two of them were to do a party with them:

🐰 planning
🐶 the bills
🐯making sweets
🐧 main chef
🐻 decoration
🐥 cooking assistant
🐱 cooking & cleaning
🦕 music

🐶: D.O. must do the cooking no matter what!
🦕: that's for sure!
🐶: D.O. is the main chef because he can cook many dishes, including pasta! Sehun can prepare the dishes, maybe he can be D.O.'s assistant?
Kai is good with his house decor and because he is also stylish so he will be in charge of decoration! Xiumin hyung is good at everything he does, so let's entrust him to do cooking & cleaning (laughs). Chanyeol is good at making sweets so he can be in charge of desserts! there are many junk foods (he made) that aren't good for health though (laughs). leave the bills to me! what will you do, Chen?
🦕: I'll probably be in charge of the music, like selecting and playing it!
🐶: that's nice~! and then our leader, Suho hyung, can be in charge of the party planning!
🦕: that’s perfect!

by somedeath