We do not suggest you use your last name with Meetup. Meetup is a world wide group. first names are best when accompanied by a last initial and a picture is always welcome.
It seems a fun meetup group.
We ask that you be open to being introduced throughout the Event, and that you treat others as you would wish to be treated. Please get to the event early enough to be introduced.
I would like to meet you at one of the event. See you soon.