Below is the info of two hotels close to the venue which you might want to consider.
Bankalar Caddesi No: 21, Karaköy, Beyoğlu, Istanbul Tel: +90-212-249 77 00
Gradiva Hotel is located next door to the Sabancı University Karakoy Center. Only 180 metres to the Galata Tower, Gradiva Hotel offers free Wi-Fi and stylishly decorated rooms with air conditioning, LCD TV and a minibar. All the rooms feature a private bathroom with amenities and hairdryer. Some rooms overlook the sea. Daily breakfast is available. You can enjoy international dishes at the terrace restaurant accompanied by the Historic Peninsula and Bosphorus views. The front desk is available 24/7. Airport shuttle service can be provided at a surcharge. The hotel staff can help you organise your trip. Karakoy Tram Station, 300 metres away, allows easy access to the historical Sultanahmet district. Ataturk Airport is less than 20 km away.
Pera Rose Hotel
Mesrutiyet Caddesi No. 87 Tepebasi, Beyoglu, 34430 Istanbul Tel: +90-212-243 15 00
The Pera Rose hotel is very centrally located, near Taksim area. It is right across from “Pera Palace” which is a very famous hotel where Agatha Christie stayed and wrote one of her books - every taxi driver would know if you told them to go to "Pera Palas". From Pera Rose Hotel, there are three options to get to the venue which is in Karakoy: 1. You can walk to “Tunel”, the oldest (137 years old) underground "system" (it only takes about 5 minutes from one end to the other). "Tunel" is a 5-minute walk from the hotel and they can give you directions at the reception. After you get out of Tunel, turn left and Sabancı University building is a 2-minute walk up the road. It's a corner building with pretty blue tiles on the outside. 2. You can walk down-hill for 15-minutes from the hotel to the venue. Ask for directions at the hotel reception. 3. Ask at the hotel to call you a taxi and tell the taxi driver you'd like to go to Bankalar Caddesi, No:2, Karakoy. That would be a 5-7 minute taxi-ride.