Lisbon is a quite small city, and there is plenty of accommodation. The venue is close to the Alcantara-Mar train station. Around the metro green line is the main area for hotels and hostels, all prices (see map; prices are per diem for a double room).

Nearest hotel
Hotel Vila Galé Ópera (walking distance from venue; €150)
Travessa Conde da Ponte

Some other options
Hotel Amazónia (€76)
Travessa Fábrica dos Pentes 12

Hotel Roma (€84)
Av. de Roma 33

Lutecia Smart Design Hotel (€80)
Av. Frai Miguel Contreiras 52

We are still looking for cheaper recommendations, and will update the information on this page accordingly.