Thank you all! It appears the consensus is that it's a genus /Chamaedorea/
Getting as far as confirmation of the genus is probably enough to dictate how it's treated, if my [limited, very limited] knowledge holds; I remember there's north of a hundred in that taxonomy and they're pretty similar.
In general, as an indoor plant: they like filtered light, moderate watering, and don't want to be overfed in growing season, and not at all in the winter. Fair enough?
Thank you all again! Marking "answered" because I think it's close enough.
[edit to add: It's probably diagnostic that it was a throw-in in a super-inexpensive bunch of mostly various Dracaena that I bought in a random bundle because I needed to liven-up my office at work. "Super-inexpensive" probably suggests Areca Palm I think...]