Well, drink coupons to be furnished at reception - not logistically the same as open bar, but functionally so.

Sometimes the reception AAngel (not to be confused with Dragon) seems a bit forgetful in offering these, in which case a simple question as to whether BA still offers me a drink or two invariably produces the requisite papers.

OTOH, Admirals Club membership includes free WiFi access, while oneworld access to Admirals Clubs doesn't.

So, depending on whether your plans are to work, surf FT, or have a drink, it's a matter of intention which is better.