If you and a couple friends can't agree on what to do this weekend, Plasis Kart ve Bilişim Sistemleri Sanayi ve Ticaret Ltd. Şti over in Eyüpsultan is an option. Activity venues usually discount for groups and charge standard rates for smaller ones. Weekend slots fill up fast — booking ahead is the smart move, since walk-ins who can't get a spot end up with a ruined afternoon.