I was picked up by the owner, Patrizia, at midnight and she immediately made me welcome. The B&B is well situated for both Citta Alta and Citta Bassa. After a lovely breakfast it was easy to find a bus into town and, after sightseeing, a bus to Citta Alta. It is a long walk to the Funicular so most of the time I took the steep walk up to the old town or used the buses to get to Citta Bassa and /or Citta Alta.
I bought a 3-day bus pass at the tobacconist next to the traffic lights that are just down the street and turn right.
The first thing I do in any new town is buy a map and in this case it made life so much easier.
Citta Bassa has some nice buildings and shops. Citta Alta has lots of good restaurants, churches and cafes to rest in. The tourist info in Citta Alta is found at the base of a tower on Via Gombito (turn right then straight up the lane as you leave the funicular). It is just before you reach Piazza Vecchia.
I stayed nights in the B&B. There was lots of good company and very good continental breakfasts that set you up for the day. I found Patrizia to be very helpful.
There are several places within a few hundred metres where you can spend a pleasant evening with the locals, Some sell food, some have free food on the counter (the Daragi was one, to the traffic lights and turn to your left). Most days I had lunch 'on the go' so I didn't take much notice of local restaurants.
Bergamo not be everyones taste but I certainly had a great time and I hope to be back there soon.