With the Travel Channel in Grass Valley to film an episode of “Hotel Impossible” at the historic Holbrooke Hotel, members of the city’s business community are hoping for a boost in tourism to follow the national attention. “They are also going to feature a lot of stuff about Grass Valley,” said Holbrooke owner Ian Garfinkel in a Feb. 22 interview with The Union. “Hotel Impossible” is a reality makeover television show focused on turning around struggling hotels that first aired in April 2012. Last year, host Anthony Melchiorri, an aggressive 20-year hospitality business veteran, spent several days transforming the Hotel …