Katherine Squire (See Soap Hoppers) was Alice Lovelace, an early member of Ina's household.
Stephen Schnetzer's Marcello Salta lived there, also, I believe, romancing housemate Katrina Karr (Nancy Snyder).
Karen and Marco
Jill Voight's Becky Lee lived there. Mary Gordon Murray moved Becky into the "Carriage House"
Ed Hall befriended Karen there
and I think you're right about Herb during a Dorian breakup
(from the infamous elevator)