When you say evening session, I presume you mean not at the Scola. Something at MIT or similar could work (to harken back to the boroughs meeting, while having it at someone's house would undoubtedly be easier, I don't think it'll have the audience appeal it needs).

I wonder if there's enough interest in this or that topic, generally, to start a series of once a month newbie-ish workshops... the fealty thing, the periodic tunic-making session...