The sit-ins were staged on the outskirts of the Yemeni capital, Sana’a.
They have warned the Yemeni government that they will take action if it fails to meet their demands until Friday, August 22.
Spokesman for the demonstrators Abu Ali al-Asdi said that the protest sit-ins were peaceful.
“The resignation of the government is a popular demand and we are against all forms of corruption,” he said.
Thousands of Houthis protested in Sana’a earlier on Wednesday.
Meanwhile, Yemeni President Abd Rabbuh Mansur Hadi held a meeting with representatives from different political parties to discuss the situation.
The Yemeni president has also called for dialogue in an attempt to ease the tensions and has even invited Houthi representatives to join a “unity government.”
The Houthi movement played a key role in the popular revolution that forced former dictator Ali Abdullah Saleh to step down.