Short itinerary

Me n my friend (girl) are renting a bike for tomorrow for few hours like 5pm to next morning 9am. We would be out till like 12 midnight. So thing is she wants to go to charminar and nothing else. I was thinking if we are renting a bike why not roam around as much we can. So I want to know what else can we do with this little time? Maybe around charminar would be more productive so what else can we do. And where can we have dinner? Please do let us know your thoughts and recommendations. Thank you in advance.