The Collaborative International Dictionary of English v.0.48:
Sociably \So"cia*bly\, adv. In a sociable manner. [1913 Webster]WordNet (r) 3.0 (2006):
sociably adv 1: in a gregarious manner [syn: gregariously, sociably] 2: in a sociable manner; "sociably, the new neighbors invited everyone on the block for coffee" [ant: unsociably]