I went armed (and still do, when I'm there) to a pile of BBQ's in Mexico. Usually I just wore my Model 49 S&W no-dash in a pocket holster. Most BBQ's one might attend are not "Gun Club BBQ's", so it's best to keep the fact that one is armed to oneself. I still own this and have it down there and visit with it every year.
If it was an actual "Gun Club BBQ", then it was usually held either on someone's Ranch or in some sort of Hacienda or place where "prying innocent eyes" could not be corrupted by a bunch of guys and gals walking around openly armed. Some of the members had some neat stuff, and they'd be strutting around, showing it off. The guy who owned this "Nash Bridges" gun -- made up in the Queretaro Custom Shop -- would be there showing this baby off. One had to dress in something competitive I suppose.
I guess my "go to" open carry gun for Mexican BBQ's was my S&W 3904 in a Jackass Original holster. Interestingly enough, this gun right now is "in the care" of the guy who owns and built the Nash Bridges gun.
There'd always be some neat stuff there if it didn't need to be concealed -- like at a private BBQ. Like this round-butt nickled Model 19 with an 8 3/8 inch K-38 barrel tacked onto it. Guady, but long-snouted .357 power guns are popular because they'll probably do better against car doors than a shorter pipe. There's a whole clique of people in the Queretaro-San Miguel Clubs that go for the long barrel revolvers although they don't conceal very well.
Our Club secretary had this nickled Model 19 with Hogue grips. I spent a nice day trying to get a 160 grain SWC up over 1,200 fps using this and only bashed up my hand. I never got it above 1,180 fps. But maybe when I move back, I'll get myself one of these baby-357's and work on a project like that. I've always liked the looks of these snubby Model 19's.
I never saw anything too flashy at the Mexican BBQ's and don't suppose I will at the ones I'm going to attend in the coming years. But I did see a lot of practical stuff. And there's never a trigger-lock or a hard-case anywhere to be found....