My group just bought a few tickets for this tailgate. Someone rented a bar a few minutes from the stadium.
https://www.eventbrite.com/e/tcu-fiesta-bowl-tailgate-tickets-476483885127
I came across this if anyone is looking for a tailgate option at Jerry World. Includes food and drinks.
https://www.eventbrite.com/e/tcu-vs-ohio-state-tailgate-tickets-46849470026
Just got an email about this for those wanting an option next to the stadium. $40 a person.
https://www.eventbrite.com/e/big-12-championship-tcu-tailgate-tickets-40083285185