Forgot to pay tab

(12$) tonight..but still

Tonight I went out got a drink with a friend they didn’t have money for the tip so they wanted me to pay I went to the bathroom and long story short I forgot I had to pay and we literally just left when we finished our drinks

Obviously I plan on going back and paying and I feel SO FUCKING BAD I did not mean to walk out on a tab with two drinks on it idk what tf I was thinking I was just thinking about food and I forgot I had to pay bc he usually pays.. they were closed by the time I realized

Advice on how to fix or make this up? I worked in the industry I’m not doing her dirty like that I left at 10:40ish they closed at 11 :(

They didn’t take my card either so they can’t just charge it.. will they be pissed if I go back in and pay tomorrow?

I used to work in the industry for 6 years but honestly have never had this happen to me or any of my co workers.. I used to work in a brunch place hosting/2yr serving/4yr where they were at tables NOT the bar area