Following hotels with good references are in the surrounding of the conference venue within walking distance.
Further hotels can be found on booking platforms like booking.com
Hotel Pierre Milano
10 min walking distance
http://www.hotelpierremilano.it/
Hotel Capitol Milano
15 min walking distance
http://hotelcapitolmilano.com/
Hotel Regina
13 min walking distance
https://www.hotelregina.it
Hotel Ariston
14 min walking distance
https://www.aristonhotel.com
Santa Marta Suites
15 min walking distance
https://www.santamartasuites.it/
Genius Hotel Downtown
15 min walking distance
https://www.geniushoteldowntown.com/