only if you want two or more of them to end up dead.
Maroons are one of the most aggressive fish out there and probably the most aggressive clownfish. The dominant female will eventually kill all but one of the other maroons...especially in a tank as small as a 55. They get to 5-6 inches and a 55 is about the smallest I would recommend for even a single pair of maroons.
Multiple anemones does not matter, they move around and may eventually wind up next to one another.
Sorry, but the definate answer is no.