I try very hard to not interupt dates. I may call when it is getting close to his time to come home to say" Pick up _____ on your way please". If I've not been feeling good Karma will actualy be the one to call me and make sure I'm doing okay.
I see it as I dont want our time interupted so I'm nto going to interupt theirs. that's another good thing of us having a determined "I'll be home or call by ___" that way I'm not calling and bugging them to find out when he'll be home.