[dbloom]

Comcast charges $34.95/mo for a sports pack for bars and restaurants: http://business.comcast.com/tv/restaurants/plans-pricing

...but only $8.95/mo for the same sports pack for waiting room TVs and other "office" uses: http://business.comcast.com/tv/offices/plans-pricing

Because Comcast uses cable (instead of satellite), they actually have two-way communication with most of their equipment. And even one-way-only equipment (like CableCard and DTA) can still be restricted to only work on the encryption keys for a very small geographical area. If Comcast equipment is moved to a location other than the address where it's supposed to be, it usually won't work.

For what it's worth, a lot of bars and restaurants use DirecTV (it has popular exclusive sports packages). Even though it's satellite-based, I've never noticed any sort of "pub glass" or the licensing indicator. So I'm not sure how they enforce licensing.

[moey]

The link you pasted says it's actually $189.95/month for the sport pack.

Also, this is aside from any premium sports subscriptions like NHL/NBA League Pass/NFL Sunday Ticket channels, which charge based on the occupancy of the bar/restaurant and costs thousands of dollars per year.