Across the street-about 200 yards :)
An easy 2-block walk; good restaurants/bars right at the marina, beautiful views, a small beach to swim or sun.
Probably 10 minutes walking.
Literallly across the main road. You can walk 5 min to Artemis Mediterranean restaurant and others to have a drink right in front of the boat rental marina
Get an answer from Postmarc Hotel and Spa Suites staff and past guests.