A holiday centre is a facility that specializes in providing apartments, chalets and camping pitches for visiting holidaymakers. A center is run commercially, and visitors are not members and have no say in the management. Most holiday centers expect visitors to hold an INF card (that is, to belong to an INF-affiliated organization), but some have relaxed this requirement, relying on the carrying of a trade card. Holiday centers vary in size. Larger holiday centres may have swimming pools, sports pitches, an entertainment program, kids' clubs, restaurants and supermarkets. Some holiday centres allow regular visitors to purchase their own chalets, and generations of the same families may visit each year. Holiday centres are more tolerant of clothing than members-only clubs; total nudity is usually compulsory in the swimming pools and may be expected on the beaches, while on the football pitches, or in the restaurants in the evening, it is rare.