KIRTHANA PILLAY STAFF at Hotel Sky in Johannesburg's wealthy Sandton district adhere to strict COVID-19 protocols, wearing masks and physically distancing from guests as much as possible; all, that is, except Lexi, Micah and Ariel. For the three concierges couldn't breathe germs on you even if they wanted to: they're robots. Robot hospitality is not new - Japanese hotels have been deploying them for years and in 2015 Tokyo's Henn'na, or 'Strange', hotel became the first to be fully staffed by machines. Several robot-staffed Tokyo hotels are now using them to serve guests with mild COVID-19 symptoms. But Hotel Sky,…