“Grand Hotel, The Musical” is a glorious gem from 1989, now presented in a full out, Broadway-quality production with a roster of superb performances that weave an evocative, sumptuous, and highly entertaining visit to 1928 Berlin.  This is arguably the best production Encores! has presented since “Chicago” in 1996, and deserves a Broadway transfer.  See it now so you can say you saw it when!