Shilling for craft stuff
Pot Still for nice traditional pub.
Hmm for margaritas not sure, mexican food place called Mezcal does frozen ones so assume do normal ones too. Probably missing somewhere obvious here.
The Gate for cocktails in general bit east of the centre, but can have at look Barras
Other nice places to drink Stereo, 13th Note, Mono, Saramago at CCA.
Glasgow Beer Works if you want to sit outside as its not bad weather