Yes, Alexa can play fan sounds all night. Alexa offers a variety of sleep sounds, including fan noises, that can help you fall asleep and stay asleep throughout the night. To have Alexa play fan sounds, you can simply ask, "Alexa, play fan sounds." This will activate the fan noise skill on Alexa, and it will play the sound continuously until you stop it. Fan sounds are often soothing and can create a calming environment for sleep. They provide a consistent white noise that can drown out other noises and help you relax and fall asleep faster. So, if you enjoy sleeping with the sound of a fan, Alexa can easily provide that for you all night long.