The lawsuit, which seeks at least $200,000 in damages, also named The Ivy restaurant as a defendant, claiming its staff gave Lohan alcoholic drinks even though she was under the legal drinking age.
An after-hours e-mail to Lohan's publicist was not immediately returned. A general manager at The Ivy could not be reached for comment.
Last month, Grandeur Inc. sued Lohan in small claims court, claiming she crashed into a company van. That lawsuit seeks $3,624.84 in damages.
Lohan, who turns 21 next month, checked into rehab after a wild Memorial Day weekend during which she crashed her Mercedes-Benz into a curb, was arrested on suspicion of driving under the influence and was photographed slumped in the passenger seat of a friend's car.
Photos: Lindsay Lohan