I was just going through the Traveller Wiki and spotted this quotation from 'Agent of the Imperium' (Which I've not actually read as yet.):

"I ended up in a starport lounge: the ubiquitous Lone Star, a franchise found on most worlds. Scouts and spacers like to spend their free time spinning stories and making or renewing friendships at this sort of place."

This suggests that SJGames's Brubeck's has another rival for the 'Starport Bar' niche, and makes me wonder whether it might not be possible to tell where you are in the Imperium by the name of the drinking establishment in the local starport?