Cross training etiquette

[laverne]

New blue belt & am an MMA fighter, I have a really solid homegrown gym etiquette training certification online, but I want to go around my area and get different looks at all the other gyms. I’ve called or sent a dm to a nearby gym before to let them know I was coming in looking for cross-training. Is that something that’s recommended to do every single time? Or can I just pop up one day, introduce myself, pay the mat fee & go