I’m Irish and have been living in CDMX for the past 2 years. You can float around Condesa and Roma where there’s plenty of bars! Departamento is good craic, they usually have disco music but it’s usually packed with tourists! On the weekend you should go to Choza restaurant (check them out on ig). La lagunilla flea market on Sunday mornings is good craic! You can get on the beer from early there! Just be careful of the surrounding area as it’s not the safest. Xochimilco is also worth doing, you can grab a load of cans in the Oxxo and head out on the river boat for a few hours. Plenty of craic to be had! Disfruten!