Prime Minister Manmohan Singh has invited Bharatiya Janata Party (BJP) leaders to dinner on Saturday.
Party patriarch L.K. Advani and leaders of Opposition in the two houses - Arun Jaitley and Sushma Swaraj are expected to come.
On Friday, the PM hosted a dinner for allies as the United Progressive Alliance (UPA) sought to sketch out a strategy to face the strong opposition onslaught it expects to face in the soon-to-begin winter session of the Parliament.
Led by the BJP, the Opposition is expected to renew its attack on the Congress-led UPA coalition government at the Centre over recent economic reforms, including the decision to relax foreign direct investment (FDI) rules in India's retail sector.