From 10 to 30 blocks from the venue you can find:
5 Stars:
Sheraton Mar del Plata Hotel
Leandro N. Alem 4221, B7600 Mar del Plata, Provincia de Buenos Aires
https://goo.gl/maps/DsHWgbRyn37C2jFr8
Hotel Costa Galana
Av. Patricio Peralta Ramos 5725, B7600 Mar del Plata, Provincia de Buenos Aires
https://goo.gl/maps/UdmYgLa3QqULtaeE6
4 Stars:
Hotel Elegance
Leandro N. Alem 3528, B7600 Mar del Plata, Provincia de Buenos Aires
https://goo.gl/maps/gYnPEJytLoKn3Yvv7
3 Stars:
Hotel Club del Golf
Aristóbulo del Valle 3641, Mar del Plata, Provincia de Buenos Aires
https://g.page/HotelClubDelGolf?share
Hotel Marino
Leandro N. Alem 3641, B7602DWQ Mar del Plata, Provincia de Buenos Aires
https://goo.gl/maps/MVtD7SbVsFCZatPu5
2 Star:
Hotel Bagu
Alem 3528, Playa Grande, B7602DWP Mar del Plata, Provincia de Buenos Aires
https://goo.gl/maps/zRaUrVBVSfkBMPzJ6
Apart Hotel Family
Av de los Trabajadores 1837, Punta Mogotes, B7603HZF Mar del Plata, Provincia de Buenos Aires
https://goo.gl/maps/jmB8ziSZ8Wx6GQk7A
What to do in Mar del Plata if you want to take some days off?
Lot of things!
Information about the city: