At this point there are quite a few possible bids for North
1. 2♣, Drury, played on over a double, anticipating either traditional response of 2♦ or the reverse response of 2♠ if the opening was light.
2. 2♦. reverse Drury with four card support.
3. 2NT, often called Jordan over a double, played as on opposite a third hand opening.
4. 3♦, Bergen, on after third seat openings and a double.
5. 3♣ Reverse Bergen, on after a third seat opening and a double.
6. 3♠, played as a limit raise.
Of course it's a frequent problem, and perhaps a somewhat unavoidable one, but I am thinking there should be at least a partial solution somewhere.
I was playing pick-up recently and partner wanted to play Bergen. I try to avoid this in pick-up games because of problems such as the above. "Let's play Bergen". "OK". Uh huh. On over a third seat opening? On over a double? I attempted toclarify this with partner but the communication wasn't working.
This I/A Forum has a pinned topic called "A primer on reverse bidding". This primer does not match my preferences in every detail (nothing ever does, I suppose), but I would happily agree with a pick-up "We do reverses as stated in the primer". It would be good to have more such guides. Convention cards, and certainly profiles, lack room for such detail, FD has room but is not practical for pick-up. Actually FD doesn't fit my way of thinking in general but that might just be me.
Anyway, I offer this up for discussion. I am not so much interested in which of 1 through 6 you regard as the best, or even in concentrating on third seat openings and doubles, rather I am interested in how to avoid having so many misunderstandings. I don't really mind, in a casual game, if the opponents explain their own bids to everyone including partner but when it has to happen on hand after hand I feel it fuels bad habits and detracts from the game.