A night before Saturday’s Hot Stove Cool Music benefit at the Paradise Rock Club, friends of the Foundation to Be Named Later gathered at the House of Blues Foundation Room for an all-star pre-party that featured a night of Rolling Stones covers played by Peter Gammons and his all-star band. Musicians Mike Gent, Bill Janovitz, Ed Valauskas, and Gammons played a run of Stones tunes for a crowd that included Saturday’s emcee, “Glee’’ actor and “Shameless’’ writer Mike O’Malley; author Tom Perrotta; WFNX’s Henry Santoro, Sports Illustrated’s Peter King; Hot Stove musician Susan Tedeschi, who jumped on stage for a bit; Derek Trucks, who also joined the music; Foundation to Be Named Later cofounder Paul Epstein and his wife, Room to Grow executive director Saskia Epstein; and Hot Stove organizer and music manager Michael Creamer. . . . On Saturday afternoon, before the Hot Stove benefit show (see review here), rocker Kay Hanley and O’Malley served meals for Horizons for Homeless Children on behalf of the Foundation to Be Named Later with local chefs Brian Roche of Lolita Cocina and Dante de Magistris of dante. The foundation, which helps children and families in Boston, reported yesterday that it raised more than $300,000 at the weekend festivities, which included a Saturday night stage appearance by Red Sox GM Ben Cherington.