It really depends on what type of traveller you are, what budget range of hotel and whether you want to be really near to the sights. Beyoglu or the European side is called that for obvious reasons, and Sultanahmet (the old quarter is precisely that) has fewer 4/5 star hotels but is where the major old historical buildings are situated such as the Blue Mosque and the Hagia Sofia. Having said that it is quite easy to get over to the Sultanahmet by public transport - get an Istanbul card and you can share that between different people.

Hola Patricia, por mi experiencia en Istambul, te diria que no te hagas problema por el tema seguridad. Eso es algo que tenemos los argentinos en la cabeza. Se puede caminar tranquilamente a cualquier hora, tampoco es cuestión de mostrar alhajas en la calle. En cuanto a los taxis son baratos. Pero tenes buses y tranvia hasta tarde, que tampoco son caros. Podes estar en la parte vieja que están las mayores atracciones turisticas. Suerte

I am very sorry but I do not know of a restaurant like that.

Sorry I can't help. Cheers, Warrick