The Ann Summers fleet includes around 20 Seat Ibiza and Leon models, alongside vehicles from other manufacturers.
Listers Group fleet manager Richard Hollingworth said: "The opportunity to deal with Ann Summers has been ideal for us. Seat’s range of cars is proving really popular with the party planners and we hope they will continue to select the brand in the future."
Mike O’Neill, Ann Summers transport manager, said: "The party planners love the Seat Ibiza, it’s really doing the job for us and we’re very happy with the cars."
Ann Summers’ staff begin by piloting 1.4-litre Stylance Ibizas, while top-performing party planners get the chance to upgrade their cars to Seat Leon 2.0-litre TDI Stylance models.
The company use its fleet to arrange and run adult-themed evenings for females only.