This is a great question. Also 'Avatar' is in HFR. I'm pretty close to a bunch of theaters and the only one advertising HFR was IMAX so we went there. It was great.

But thanks to the reddit hive mind since learned pretty much most* dolby 3d screens will play HFR and it's great.

My understanding based on consensus is Dolby Cinema, IMAX, RealD.

Hope that helps!

*just call ahead and ask.