"Nearly 37,000 Denver residents added the same thing to their wallets last year: a library card. Library workers expect that number to increase even more as people look to save money. 'When people can't pay $20 to catch a show downtown, they can come here for free and educate themselves,' said library patron Brian Kalkoph as he browsed through shelves of CDs that can be checked out. 'When times get though, people go to the library,' said spokesperson Celeste Jackson. She estimates that 75 percent of Denver residents now have library cards"