Looking for Suggestions/ Visiting lucknow for few days.

Hey all, I am going to visit Lucknow with my girlfriend next week. Will stay there for around 5 days. First I want to know if hotels around there are safe and secure for us? If we should go ahead with airbnb otherwise? Also we will be mostly exploring the city so what should we do, some must try activities. Also I have heard about Lucknow’s food so what all should I must try ? Also is there any bike rental service in there? Any suggestion would be very helpful.