He made the announcement while addressing supporters of the People's Democratic Reform Committee (PDRC) on Wednesday evening.
“We will make all the roads in Bangkok 'walking streets', picnic streets, and we will eat in the middle of the road,” Mr Suthep told supporters at Pathumwan intersection.
The PDRC and its allies will hold “massive protest marches” along several major roads throughout election day. He claimed the marches were not intended to obstruct the election, but only to express the protesters’ opposition to it.
Mr Suthep believed the Feb 2 poll would be nullified by the court later as voting could not be held in some provinces and constituencies.
He said voters who do not exercise their right to vote on Sunday need not worry about the legal consequences as the poll will eventually be declared null and void.
The PDRC will march from On Nut along Sukhumvit to Asok on Thursday to invite Bangkokians to join the Sunday anti-election mass demonstrations and oust caretaker Prime Minister Yingluck Shinawatra and her cabinet.
On Jan 31, the protesters will demonstrate on Lat Phrao and Ratchada roads and will visit Yaowarat and Silom areas on Feb 1, Mr Suthep said.
He called on City Hall officials to close all 50 Bangkok district offices and join the PDRC protests from Thursday to Sunday.