Hi Edgar,
Thanks for your post. We don’t have a specific RSVP plugin or feature, although we are considering adding it. We have a UserVoice thread for this feature so you can vote to have us add it in a future build. Adding your vote there will also allow you to stay updated as we work on it.
One option is one of our five ticketing plugins, which allow you to charge for specific events. You can collect the name and information of the person making the purchase. Might that meet your needs? It’s also possible that you could add RSVP functionality with some customizing, but that would be beyond our support capabilities to assist you with. Does that answer your questions?
Best,
Leah