Hi Ruth,
We’re quite limited on choice without a fair walk, and some are closed at the time we want to meet up. I think Bar CafeterÃa El Salsero may the best option close by from what we’ve found. They are situated on the corner of the first block on Calle Santander, the side road into the Medular just before the theatre, if you were coming from the direction of the Cabildo
https://es.restaurantguru.com/Bar-Cafeteria-EL-SALSERO-Arrecife
Is this ok for you?