The beginning of the Seattle Attic's conduct policy may be relevant to the
inclusivity/exclusivity phrasing question:
http://seattleattic.com/codeofconduct.

In my experience it's not possible to welcome everyone (you usually have to
pick between the harassed and the harassers sooner or later). Including
"our doors are not open to everyone" would suggest that NIL is a space I'd,
possibly paradoxically, be more comfortable in.

(fixing misthread)