Takes a lot more effort/alcohol to go from breakfast to sleepover than drinks to sleepover.........IMO
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I think I see from where you are coming, but I mean it differently. First, there is the invitation for breakfast. Then, if the two hit it off, they may work up to a lunch date, then a dinner date if all is still progressing nicely. Before you know it the dinner date, which is sure to include at least a bottle of wine, will turn into,
"hey, do you want to join me for breakfast tomorrow?"
"Sure, why don't we make it easier, and you just spend the night, then I will whip you up a bloody mary in the morning?"
"Perfect."