Wow! I’ve bought “beers” for women in bars for years! And never thought twice about it.
To me, it has been basically an equivalent to holding a door open for a woman. Nothing more.
Boy, all the missed opportunities!!!!!
You confused the heck out of them, perhaps even insulted them. You were supposed to want her bad, in which case she’d be insulted anyway if she wasn’t interested in you to begin with. Make sense? Nah. Me neither, lol.