During the summer there are no meetings but check-out their webpage in september :
http://playgroupmadrid.tripod.com/
Next to the Retiro, they organize activities during the week and a huge playgroup the 1st saturday of each month.
Different style, the anglican church at N??ez de Balboa (Barrio de Salamanca) also organize playgroup :
St. George’s Church, Madrid (Anglican/Episcopalian)
Nu?ez de Balboa 43
Madrid
tel: 91.576.5109
email: .(JavaScript must be enabled to view this email address)