Everybody signs up for desserts. Somebody has to sign up for ice. Be the ice person.

The appealing jobs are always oversubscribed and the necessary ones go begging. Everybody wants to bring the thing people will compliment, and nothing works without the dull supplies somebody has to remember, pay for and carry in. Being genuinely useful usually means looking for the gap rather than the glory. The gap is also where you get trusted fastest.

Find the sign-up sheet, the group chat, the list of jobs, and take whatever is still empty. Bring the ice, set up the chairs, do the cleanup slot. Notice how quickly people start counting on you.