a quick google search would have shown you that pizza anemones naturally host three species of clowns- Maroons, Clarkii's and Tomatos. being that pizza nems are not natural hosts for percs, the chance of them hosting in one is less likely than that of them hosting in say, a sabae or a haddoni.
however, they may still decide to host in one. IME, percs are very inclined to have some sort of host, far more so than the occys I've had- mine usually take up residence in some sort of coral, had one pair choose an open brain, then move to a candycane frag, then to frogspawn, and had my current one choose a hairy mushroom, then moved to a striped one, then to a different hairy.