Large resorts seem to always have it. I have also enjoyed it at the Quincy FS, the NYC Marquis, EWR FS - which is great because all of them often have lines. At smaller FS it seems to be available when they are busy, but they umm...roll up the rug otherwise.

By far my favorite though is the new Ren check in - AUS does a fabulous job as does CLT. What a nice (and fast) welcome!