Having wrapped up its exploration of the Classical period on Friday night, Music@Menlo heads this weekend into the Romantic era. But first, the festival presents its annual Open House. Saturday’s schedule of free events begins with a Q&A Coffee with the Artistic Directors in the Festival Welcome Center at 8:30 a.m. The day also features a number of open rehearsals, including a preview of the summer’s next Carte Blanche Concert: at 9:30 a.m., pianist Wu Han, violinist Philip Setzer, and cellist David Finckel will run through the piano trios of Franz Schubert in Stent Family Hall. Open House day also includes a Cafe Conversation with 2008 Visual Artist Doug Glovaski (12:00 noon) and the season’s first Koret Young Performers Concert (5:30 p.m.). The day culminates with the season’s second Encounter, “Nostalgia is Not Enough: What is Romantic?” led by Michael Steinberg (7:30 p.m., Martin Family Hall; tickets required).