Convention centers and convention center hotels should offer free internet access. There’s no excuse not to do so.
And no, Louisville Convention Center, it does not cost $100/day to provide access in your exhibit hall. Hell will freeze over before I or any sane person would pay anything like that. Frankly, hotel-near-the-Louisville-Convention-Center, $12.95 is too much to spend per day. Charge a dollar a day if it makes you feel better.