Across the street from the New Orleans Convention Center, this modern Marriott manages to avoid the sterility of so many business hotels. The old building began as a cotton mill in the 1850s, and a dollop of old New Orleans charm survives in the soaring atrium and the graceful dining room of Wolfe’s in the Warehouse. The rooms at Mariott at the Convention Center are comfortable, though tight. Cool off with an afternoon dip on the third-floor deck pool. If you choose the fourth-floor concierge level, you’ll be treated to extra amenities, like a private lounge.