Denver’s craft beer scene was dealt a crushing blow over the weekend when Falling Rock Tap House, a pioneer in serving and supporting America’s microbreweries, announced it will soon close. Brothers Chris, Al and Steve Black opened the bar in 1997, and with more than 90 draft taps and a cellar full of rare and speciality bottles, it’s been a destination for seasoned beer drinkers and craft novices for more than two decades.