営 (Kanji for manage (a business))

Onyomi

The Mohican is the manager of the bath-house patronized by AYliens

いとな＊む

to run a business - although it's not a formal word, いとなむ is usually used by older people. Normally Japanese people use 経営 instead.
★☆☆☆☆

営業中(えいぎょうちゅう)

open for business ★★★★☆
営 (manage (a business)) + 業 (business) + 中 (middle) = 営業中 (open for business)

open for business (a sign you'll see on every store window)

経営(けいえい) する

to run your own business. ★★★☆☆
経 (experience) + 営 (manage (a business)) = 経営 (to run your own business.)