Fiery crimson turns up the heat at a hot party.

There's nothing like a lounge area to encourage guests to get cozy. Strew it with colorful pillows in various sizes to make it especially inviting. Furniture, TriServe Party Rentals, 212-752-7661. Cushions, Just Linens, 212-688-8808. Flowers, Karen Bussen, 212-643-6880, karenbussen.com.