What do you say?
Would you like to do this? Do you agree? I was thinking we could go to dinner in town, and maybe go see a movie afterward. What do you say? I think we would benefit from a new set of computers for our IT department. What do you say?
What would you say to (something)?
Would you like to do something? How do you feel about doing something? I know you wanted to go to your friend's party, but what would you say to a trip to Disneyland instead? What would you say to dinner and a movie this weekend?