Marriott International is to pay £373,000 ($600,000) after the Gaylord Opryland Resort and Convention Center in Nashville, Tennessee, blocked conference delegates’ own wi-fi networks, forcing them to pay for the hotel’s own connection.
The problem was noticed by an attendee last year who reported it to the Federal Communications Commission (FCC).
By disabling the connection, Marriott was able to charge conference organisers between $250 (£156) and $1,000 (£626) per access point to use the hotel's wi-fi.
Marriott has agreed to pay the fine to the FCC and instructed its hotels not to use the wi-fi blocking technology.
In a statement, Marriott said: "Like many other institutions and companies in a wide variety of industries, the Gaylord Opryland protected its wi-fi network by using FCC-authorised equipment provided by well-known, reputable manufacturers. We believe that the Gaylord Opryland's actions were lawful.
"We will continue to encourage the FCC to pursue a rulemaking in order to eliminate the ongoing confusion resulting from today's action and to assess the merits of its underlying policy."