No, you can't upgrade to Club for $35. They recently had a program to upgrade to a suite for $35 but according to Loew's when I called to ask about it. You had to be paying a special (higher) rate to get it and it had to be available. Now some folks have reported success getting the $35 suite upgrade with the entertainment rate, but not too many. So it's worth a try to ask I guess. I remember someone reported being offered Club for $50/night extra. You would have to eat a lot of club food and beverages to make it worth while IMO but that's your call!