Madrid works for corporate team building because the late-dinner culture stretches the usable day to 23:00, tapas formats are naturally social, and AVE rail puts Toledo (33 min) and Segovia (27 min) inside a half-day. Small groups thrive in La Latina and Malasaña, mid-sized in Chamberí and Salamanca, large in Chamartín or the airport cluster. Best seasons are April–June and September–October. Avoid August. Twelve real hotel-anchored venues below, sorted by team size, with per-head budgets that beat Paris by 20–30%.