Baby Shower Luncheon Wording

Doing a luncheon/Baby Shower 4 coworker @ restaurant. Guest will pay 4 their own meal. How do I word that?

I am in charge of sending invite to coworkers, there will be cake and games to play. Just looking for ideas on how to word this without sounding rude. Decided to have it at a restaurant cuz mommy-2-b is fairly new to our company and is not comfortable with a big group of people.

This will be a Dutch Treat event.