Community Servings CEO David Waters hosted his annual Summer Garden Party at his home in Cambridge on Wednesday night for supporters of the organization, which gets meals to people and families living with critical and chronic illnesses. Guests at the soiree included Community Servings board member Catherine Matthews, Mandarin Oriental catering director Mark Schwindenhammer, Citizens Vice Chairman Robert Matthews, restaurateur Michaela Larson, Community Servings executve chef Tim Williams, and UpStairs on the Square co-owner (and Community Servings board member) Mary-Catherine Deibel.