Absolutely. You can use it whenever you wish between 11am-10.30pm. (or 24/7 with hostel’s permission).
Located in one of the liveliest and most authentic districts of Paris, Le Regent Montmartre is located a few steps from the Gare du Nord. It is surrounded by hundreds of bars, pubs and cafés, as well as famous landmarks such as the Sacré Cœur, the Moulin Rouge and Pigalle.