VFW Post 3787 occupies its Grantville hall at 4370 Twain Avenue, San Diego, 92120, operating as a veteran-owned fraternal organization that serves active-duty service members, veterans, and their families through advocacy, social programming, and community events. The post runs a canteen with a full bar and food service that carries a 97-out-of-100 health inspection score from the San Diego County Department of Environmental Health, and the hall hosts Friday fish fry nights with live music from veteran musicians. A Veterans Legal Clinic has operated at the post every third Saturday since 2009, providing walk-in self-help legal guidance on topics including disability claims, housing rights, and benefit appeals—community service work that parallels the fraternal programming at San Diego Elks Lodge #168 in San Carlos. The hall is available for private event rentals including anniversary parties, birthday celebrations, and wedding receptions, with wheelchair-accessible entrances, seating, and restrooms throughout the building. Operation Courage is Beautiful, a partnership between Post 3787 and the Armed Forces YMCA, collects care products for female service members deployed overseas. Twain Avenue sits in the Grantville commercial corridor between Mission Gorge Road and the I-8 interchange, placing the post within the same cluster of auto shops, breweries, and trade businesses that define the neighborhood. The Ladies Auxiliary and Men's Auxiliary run volunteer programs at local hospitals, veterans' homes, and VA medical centers. Event coordinators such as Kevin's Bartending & Event Services in Grantville work the same circuit of hall rentals and private functions that fill the post's weekend calendar. The post's annual Poppy Drive raises funds for veteran relief programs through community poppy distributions across San Diego County.