Well, Starbucks is pretty deserted on a Sunday morning between 10:30 and midday. I've been twice now and it was the same - people leaving as I arrived around 10:30 and barely a handful coming in between that time and about 12:00.
So, it looks like it would be a good time to have St Arbucks; plenty of space for us to move around in. But it would only work if people brought their friends. And the question is 'is this a good time for our friends to come for a coffee, a breakfast panini and some conversation about life, the universe and God?'