We sit down at a table and have a beer or glass of wine or coke, and we speak Spanish, about anything.
The idea is to not be pedantic and correct other's mistakes unless being asked to do so. Dialects, slang and spanglish are OK, as long as the conversation flows!
You do not have to RSVP but it entices others to attend. By signing up you will be showing other interested people your ideas about the ideal meetup. By singing up you'll be informed of events and activities.
Hope to see you there