Find leads for advertising in restaurants SPb

Good afternoon. Offering extra earnings. You need to put advertising (find advertisers) for a chain of pizzerias (9 restaurants). They have our tag on every table and they give our mobile phone charging to every customer who asks to charge their phone. (A total of 3 advertising surfaces on the table). The price for all establishments is only 100 thousand rubles. A month. I am willing to share 10% of the advertising budget. Restaurant audience: First segment: youth from 16 to 22 approximately 30%. The second segment: people from 25 to 40 years with children. The average check from 700 rubles to 1500 rubles per visit.