Entrepreneur Expo: More than 120 exhibitors will provide displays and information on home business opportunities beginning Saturday at the Entrepreneur Expo at the Long Beach Convention Center. Exhibitors at the show represent companies seeking associates for business that can be operated from a residence. Representatives for the import-export business, vending machine service firms, home and auto repair companies and book and video distributors will be among those at the expo. Executives with the Denver-based S.C. Promotions, the company producing the show, cite studies predicting a 36% increase in the number of people working from home on a full or part-time basis by 1988. Hours for the two-day expo are 11 a.m. to 5 p.m. For more information, call (800) 800-0035.