A new coffee shop — with both humans and cats on staff — is coming to Grand Avenue. Catzen Coffee Bar and Den is set to open this fall with both a cafe and a “den” where customers can hang out and enjoy coffee and snacks with the shop’s resident cats. The cafe will be at 1416 Grand Ave. in Macalester-Groveland, in a building that had been previously subdivided into a chiropractor and hair .