When booking group accommodation in Mayfair, prioritise bedroom configuration and total capacity, bathroom count, kitchen suitability for group cooking, communal space for evening socialising, transport links, and compliance with London's 90-day short-let rule. Whole-building stays offer privacy and shared amenities that hotel room blocks cannot match. The Grosvenor Collection by Luxury London Listings accommodates up to 24 guests across four apartments in one Mayfair building, with private lift access and concierge support. Book six to twelve months ahead for peak-season group dates.