City officials say they don't think the suit will prevent the ban from taking effect Friday.
Bars, restaurants, hotel rooms and bowling alleys will no longer allow their customers to smoke inside starting June 1st.
The Indianapolis smoking ban exempts some specialized businesses.
The proposal now goes to Mayor Ballard's desk for approval.
Governor Mitch Daniels signed the statewide smoking ban into law Monday.
Daniels says Right-to-work is one of the key achievements of Indiana's 2012 legislative session.
The General Assembly passes controversial bills on topics ranging from Right to Work to human trafficking.
The Indiana General Assembly approved a final version of the statewide smoking ban Friday.
Some legislators say it’s possible the ban won’t get passed this year.
A co-sponsor of the statewide smoking ban says the bill could have too many exemptions to garner his support.