Sounds like some very nice opportunity you have there in the USA. I really like the idea, but unfortunately i have never heard of any bar
freerolls running here in
germany.
You could simply find a live poker tournament at local
casinos, but the buy-ins start from 50€ and more. So it's quite too expensive for my bankroll and is way too high limit for someone who is not experienced at live poker too, just like me. So i am staying by
online poker tournaments.. You are very lucky, that you have this opportunity to train your live poker skills for free!
p.s. Although i have to admit, i been watching several times such live games at casino and found out there are quite many weak fishy players in there. So i really hope my bankroll can afford it soon, because i think the field is amazingly weak there for such limit, comparing to online poker and can be very profitable to play there.