JR Ueno Station is a good meeting point. If you take the south exit you can reach Ameyoko within a walking distance.
Ameyoko is a busy market street where you can find various products such as bags, cosmetics, dried food, spices, herbs, fresh fish… and also a few bargains in clothes and shoes. The stores at Ameyoko are usually open until 19:00.
In addition, there are several izakaya in the area where you can enjoy a few drinks and food. Izakaya food is more substantial than tapas and many items are designed to be shared.
Afterwards, if you want to escape from the crowd you can do it easily because Ueno Park is not far at all from here. When you walk through this park during the day you think you found an oasis in the middle of the city. However, this experience is even better at night.