Please consult your NSS to know in which hotel you are staying.
Hotel Intercontinental Athenaeum
http://www.ihg.com/intercontinental/hotels/gb/en/athens/athha/hoteldetail
Address: Syngrou Avenue 89-93, Athens 117 45, Greece
Hotel Metropolitan
http://metropolitan-hotel-athens.h-rez.com/
Address: Leoforos Syngrou 385, Palaio Faliro, 175 64, Greece
Hotel Metropolitan is about 4,7 km from Hotel Intercontinental Athenaeum. There will be shuttle services operating between the two hotels.