DO NOT USE THIS HOTEL IF YOU PLAN TO BOOK WITH A LARGE GROUP OF PEOPLE.  THEY ARE COMPLETELY INFLEXIBLE!.  USE OTHER HOTELS IN LV.\n\nSo planned to stay at this hotel with a large group using a promo code.  I planned to stay one night and called to book about 2 weeks before the stay.  They informed me, I was 2 days late and my promo-code had expired.  My room was supposed to cost $160 for the night.  The receptionist said sorry, the room will now be $350.  I called our \"party manager Carrie Gonlag\" who was the hotel employee in charge of booking groups.  She was completely inflexible and also offered me nothing.  I then spoke with a \"resort  manager\" who said she couldn't do anything, but with her \"special deals\" she could offer me a room for $400.  Somehow even with her \"special deals\" the price went up in the 2 hour window? I then checked online and a room appeared for $325.  \n\nSo moral of my review.  1) Don't stay at Cosmopolitan with a large group.  As most people know, anything with a large group requires flexibility and this hotel certainly does not offer that.  Stay anywhere else, but not here.  And if you speak with Carrie Gonlag, just hang up the phone.  You will not be helped in anyway.  \n\nI plan to leave this review on a few more travel websites as well as I feel very strongly about this.  Customer service is what drives business especially in the competitive Las Vegas market.  Would helping one person who got caught up in the holidays spending time with family and missed a reservation date really have hurt Hotel Cosmopolitan?  Probably not.  But they don't seem to care.