A problem with crumbs, and chairs!

I enjoy visiting cafes but have severe anxiety around sitting on certain kinds of chairs. Unless I can find a chair, usually wooden, that doesn't have anywhere that crumbs can be hiding I feel the prickle at the back of my neck, voices seem louder and I refuse to sit down. If there are crumbs on the table I can at least ask them to clean it. Ditto crumbs/mess on the floor. Manageable if i’m alone but if I’m with my daughter or partner, I feel forced to sit then, then descend into a meltdown that can last until i have the chance to sleep. It also means I’m even less likely to meet up with people i like (perhaps they are ‘friends’,  I don’t really know, they’re mainly ex/colleagues).

If I am already feeling sensory overwhelmed by other things I can’t even make it through the door! My partner is understanding (usually), daughter less so!

Anyone experience similar or got advice?