Look elsewhere
Stayed at the Martinique for three nights and was far from impressed. Location is good close to Penn station, MSG and Macys but that is about it when it comes to positive sides of this place. 
The two rooms I saw were worn and dirty and overall service from both reception and housekeeping was uninterested and frankly bad. One day housekeeping forgot to attend to my room...
As a Club Carlsson (their loyalty program) gold member I had higher hopes as Radisson usually grants for better quality but that is not the case with this hotel. I recommend looking elsewhere and if you want to stay in this particular area the Eventi hotel two streets south is a much better pick.