Dallas-based Omni Hotels is ringing in the holidays with an over-the-top cocktail experience that will debut at 27 hotels across the U.S., including seven in Texas and one on San Antonio's River Walk.

Snapshot: El Colegio Bar is nestled inside the Omni La Mansión del Rio. Though it retains some of the hotel-bar feel, the erudite atmosphere and 1930s-era drink offerings harken back to the room’s ...