Harry: lazy days with Harry usually consist of you showing him the muggle tv shows and music you grew up with, and cuddles. Lots and lots of cuddles.
Draco: on the rare occasion that you and Draco arent busy, you usually just sit and talk all day, sometimes take naps, but always enjoy each other's company
Ron: when you and Ron have lazy days, you guys play games like Hide n Seek and Tag in your flat