Yes, they have other things to do

"Sarah, do most vampires breath?"

"Well, we don't have to. But most of us do anyway since we'd have to pause to take a breath to talk if we didn't."

"Would our pheromones affect vampires?"

"Sure, as long as they breathed it in. And they might just stop as soon as they smelled something wrong."

"Buffy."

"Yes, Master."

"Tonight, you're going to collect some new slaves for me. We know where Drusilla is, so you're going to get her for me. Don't get yourself killed, just dust everyone but her. And then take her to your house. Sarah and I will be arriving there around sunrise. Joyce and Dawn has better be ready to worship me by the time I get there."

"Yes, Master," Buffy smiled a perverted smile.

"Sarah."

"Yes, Master?"

"Buffy reminded me of somethings, so I am going to pay WIllow and Cordelia a visit tonight. You can come with me if you like, or go clubbing on your own."