If you go boxing with James, I think you get 2 renegade and 2 paragon interrupts.
When having meetings with the diplomats you usually get at least 1 shut-the-hell-up interrupt
Buying drinks to the troopers in Purgatory has 1 Renegade interrupt
Off the top of my head, with some 10 hours in single player campaign.
EDIT: Galactic readiness at 79%. Soon I will have enough readiness that I can fulfil my dream since Me1 and
Spoiler prevent curing the Genophage once and for all while still getting the ultimate good ending.