Wear normal street clothes to your first munch. Munches are held in public venues such as restaurants, and attendees dress appropriately for that venue. Do not wear fetish gear, visible collars, or explicit kink indicators. The goal is to blend in with the surrounding public.
Normal street clothes are appropriate for a first munch, and dressing in anything overtly kinky would violate munch etiquette. Munches are held in public venues such as restaurants, cafes, or bars, and the entire point of holding them in public is that kink is not visible to other patrons. Attendees dress as they would for any casual meal at the same venue: jeans, slacks, casual tops, or whatever fits the setting. Fetish gear, corsets worn openly, leather harnesses over street clothes, visible collars, and explicit kink-related T-shirts are not appropriate and can create problems for the host venue. Discrete kink jewelry is acceptable at most munches; a small pendant or ring that is meaningful to you but not obviously kinky will not draw attention. Grooming and hygiene matter; munches involve meeting new people in close conversation. The mood is casual and friendly, not formal. If uncertain about dress code, ask the munch organizer in advance. Beyond clothing, bring cash or a card for food or drinks (many munches expect attendees to order something), and bring an open, curious attitude. Most munches welcome newcomers and will introduce you to others.