Bridal Shower

A friend/co-worker is getting married (2nd wedding) out of state. We want to have a bridal shower for her at a restuarant, a very informal get together. How do we word the invite to let them know we are serving cake, but they would have to buy their own drinks and food if they were to eat. Time of shower will be after lunch/before dinner around 2:00pm. Also for ladies only, no guys. Thank you!