Tanya Grubich, a pioneering marketer of Broadway and touring productions whose clients included the musicals Grand Hotel, Smokey Joe’s Cafe and Mamma Mia!, died February 16 of Early Onset Dementia. The Bucks County, Pennsylvania, resident was 60. Born Tanya Marie Grubich in Ft. Lauderdale, Florida, Grubich grew up in the family business, the Original Christmas …