I am allergic to beer, a sip would swell my throat shut, but it doesn’t bother me if everyone in the stadium is drinking it. I’m fine with peanuts.
The difference with peanut allergies is they react to the skins and crumbs which have a tendency to get airborne while eating, so people eating peanuts nearby present a real danger to the person with the allergy. If beer puts its allergens airborne your situation would be very different.