While in town to celebrate her partnership with Cambridge-based investment firm General Catalyst Partners, actress Jessica Alba had dinner with friends at Rialto at the Charles Hotel. Alba tweeted her approval of chef Jody Adams’s fennel herb-crusted lamb and chops crespelle. General Catalyst raised money for the Honest Co., a line of earth-friendly baby products cofounded by Alba. . . . Car king Herb Chambers presented Sox third baseman Kevin Youkilis with a sweet new ride Wednesday. To celebrate their marketing partnership, Chambers gave Youk the keys to a Lexus LS 460L.