The word workplaces is playable in Words With Friends™, no blanks required. Because it is longer than 7 letters, you would have to play off an existing word or do it in several moves.
Words With Friends™ Letter Score: 24
Highest Scoring Words With Friends™ Play In The Letters workplaces
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Seven Letter Word Alert: (30 words)
carpels, clasper, clawers, coakers, coalers, earlock, escolar, lockers, oracles, packers, parcels, paroles, placers, plowers, presoak, reclasp, recloak, recoals, relocks, repacks, replows, rewalks, scalper, scowler, slacker, solacer, spackle, sparkle, walkers, warlock