No licensee shall conduct the business of making loans under the Nebraska Installment Loan Act within any office, room, or place of business in which any other business is solicited or engaged in, or in association or conjunction with any other business, if the director finds that the other business is of such nature that the conducting of such other business tends to conceal evasion of the act or of the rules and regulations adopted and promulgated under the act. In such case, the director shall order such licensee in writing to cease and desist from such conduct.