The Corniche de Gamkalle is the Niger River esplanade that comes alive in the evenings when the worst of the day's heat relents. A string of open-air bars and informal restaurants line the riverbank, most with plastic chairs and tables set out directly facing the water. The view across the Niger — wide, slow-moving, with the occasional pirogue drifting by — is genuinely fine.
This is where Niamey relaxes. The expat and NGO community that sustains much of the city mixes here with local professionals and students, and the atmosphere is notably relaxed by Sahelian-capital standards. The bars sell cold Flag or Bière Niger, and most have grilled meat and basic food available. Arrive around sunset for the best light and the most active scene. Les Tropiques is the most famous of the riverside spots; Le Diamangou next door is a solid second option.