我想请你吃饭用英文应该怎么说，请口语（美式）化一点，谢谢

I'd like to treat you the dinner/lunch

I wanna invite you to dinner.
(wanna = want to是美国的俚语，也就是很口语化的说法，比如 gonna = going to)

i wanna invite you to have a dinner with me.

I wanna invite you to dinner.

dinner ok? My treat!

Wanna have dinner/lunch with me? My treat!