The Coffee Shop would be closed at this late hour, even if it had been open she probably wouldn’t have chosen it. A secluded alley to apparate away would have been the safer bet. Entering a crowded space would only save her from a muggle predator, who would likely get bored and move on. But if her follower was magical, they’d simply wait her out. She was hedging her bets that the person was magical anyhow, as the motive was much more significant. It could be anyone from a reporter, to a disgruntled fan or family member of a patient, or a wanna-be Death Eater.