DEI Worldwide, a social media marketing company, is located on Ventura Blvd., in Studio City. This agency's specialties include market research, integrated strategies, conversational outreach and interactive development. David Reis is its founder and president. Services include product branding and re-branding, viral and on-line word-of-mouth campaigning, off-line promotions and more. Its clients include public relations firms as well as creative media agencies.