Marriott hotels will no longer interfere with their guests' personal Wi-Fi hotspots, the hotel chain announced Wednesday. That includes within the confines of the company's lucrative convention and trade-show spaces, where it's charged attendees anywhere between $250 and $1,000 per device for Internet access."Marriott International listens to its customers, and we will not block guests from using their personal Wi-Fi devices at any of our managed hotels," the company posted in the news center on its website.