Mukherjee, who reached here this afternoon, went straight from the airport to the CM's 5 Kalidas Marg residence where all members of the UP Legislature, including ministers, were invited for lunch by Akhilesh.
SP and Congress members along with MLAs of other parties attended the lunch while BSP and BJP members skipped the function.
MLAs of smaller parties, including Mukhtar Ansari of Kaumi Ekta Dal and Anupriya Patel of Apna Dal, also attended the lunch.
SP supremo Mulayam Singh Yadav, Akhilesh and senior ministers, including Mohd Azam Khan, were present on the occasion.
Union Coal Minister Shriprakash Jaiswal, Union Minister of State for Parliamentary Affairs Rajiv Shukla, UPPCC chief Rita Bahuguna Joshi and CLP leader Pramod Tiwari, all Congress leaders, were also present.
The former Union Finance Minister, who is here as part of his election campaign, is slated to meet MLAs of Congress, RLD and other allies at Taj Hotel.
Before leaving for Delhi, he will attend a dinner hosted by BSP supremo Mayawati at her residence.