diff --git a/app/Console/Commands/Database/CleanupPlaces.php b/app/Console/Commands/Database/CleanupPlaces.php
new file mode 100644
index 0000000..d58ba1b
--- /dev/null
+++ b/app/Console/Commands/Database/CleanupPlaces.php
@@ -0,0 +1,81 @@
+<?php
+
+namespace App\Console\Commands\Database;
+
+use App\Models\City;
+use App\Models\Venue;
+use Illuminate\Console\Attributes\Description;
+use Illuminate\Console\Attributes\Signature;
+use Illuminate\Console\Command;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Collection;
+
+#[Signature('places:cleanup {--force : Actually delete instead of doing a dry-run}')]
+#[Description('Delete venues without any course or bitcoin events, then cities without any venues or meetups.')]
+class CleanupPlaces extends Command
+{
+    public function handle(): int
+    {
+        $force = (bool) $this->option('force');
+
+        if ($force && ! $this->confirm('This permanently deletes venues and cities on this database. Continue?', false)) {
+            $this->warn('Aborted.');
+
+            return Command::FAILURE;
+        }
+
+        // Venues first: removing unused venues can make their city deletable in the same run.
+        $venues = Venue::query()
+            ->whereDoesntHave('courseEvents')
+            ->whereDoesntHave('bitcoinEvents')
+            ->get();
+
+        $this->deleteAll('venue', $venues, $force);
+
+        $cities = City::query()
+            ->whereDoesntHave('venues')
+            ->whereDoesntHave('meetups')
+            ->get();
+
+        $this->deleteAll('city', $cities, $force);
+
+        $this->newLine();
+        $this->table(['Type', $force ? 'Deleted' : 'To delete'], [
+            ['Venues', $venues->count()],
+            ['Cities', $cities->count()],
+        ]);
+
+        if (! $force) {
+            $this->comment('Dry-run only. Re-run with --force to apply.');
+        }
+
+        return Command::SUCCESS;
+    }
+
+    /**
+     * @param  Collection<int, Model>  $models
+     */
+    private function deleteAll(string $label, $models, bool $force): void
+    {
+        if ($models->isEmpty()) {
+            $this->info(sprintf('No unused %s entries to clean up.', $label));
+
+            return;
+        }
+
+        $this->info(sprintf(
+            '%s %d unused %s entry/entries.',
+            $force ? 'Deleting' : '[DRY-RUN] Would delete',
+            $models->count(),
+            $label,
+        ));
+
+        if (! $force) {
+            return;
+        }
+
+        // ->delete() per model (not a mass delete) so Venue media is removed via its delete hook.
+        $this->withProgressBar($models, fn ($model) => $model->delete());
+        $this->newLine();
+    }
+}
diff --git a/app/Models/Venue.php b/app/Models/Venue.php
index a246246..e6b99ee 100644
--- a/app/Models/Venue.php
+++ b/app/Models/Venue.php
@@ -102,4 +102,9 @@ class Venue extends Model implements HasMedia
     {
         return $this->hasMany(CourseEvent::class);
     }
+
+    public function bitcoinEvents(): HasMany
+    {
+        return $this->hasMany(BitcoinEvent::class);
+    }
 }
diff --git a/tests/Feature/Console/CleanupPlacesTest.php b/tests/Feature/Console/CleanupPlacesTest.php
new file mode 100644
index 0000000..33e3344
--- /dev/null
+++ b/tests/Feature/Console/CleanupPlacesTest.php
@@ -0,0 +1,50 @@
+<?php
+
+use App\Models\BitcoinEvent;
+use App\Models\City;
+use App\Models\CourseEvent;
+use App\Models\Meetup;
+use App\Models\Venue;
+
+it('does nothing on a dry-run', function () {
+    $venue = Venue::factory()->create();
+
+    $this->artisan('places:cleanup')->assertExitCode(0);
+
+    expect(Venue::query()->find($venue->id))->not->toBeNull();
+    expect(City::query()->find($venue->city_id))->not->toBeNull();
+});
+
+it('deletes unused venues and cities with --force', function () {
+    $venue = Venue::factory()->create();
+    $city = City::query()->find($venue->city_id);
+
+    $this->artisan('places:cleanup', ['--force' => true])
+        ->expectsConfirmation('This permanently deletes venues and cities on this database. Continue?', 'yes')
+        ->assertExitCode(0);
+
+    expect(Venue::query()->find($venue->id))->toBeNull();
+    expect(City::query()->find($city->id))->toBeNull();
+});
+
+it('keeps venues with course events and bitcoin events', function () {
+    $withCourse = CourseEvent::factory()->create()->venue;
+    $withBitcoin = BitcoinEvent::factory()->create()->venue;
+
+    $this->artisan('places:cleanup', ['--force' => true])
+        ->expectsConfirmation('This permanently deletes venues and cities on this database. Continue?', 'yes')
+        ->assertExitCode(0);
+
+    expect(Venue::query()->find($withCourse->id))->not->toBeNull();
+    expect(Venue::query()->find($withBitcoin->id))->not->toBeNull();
+});
+
+it('keeps cities with meetups even without venues', function () {
+    $meetup = Meetup::factory()->create();
+
+    $this->artisan('places:cleanup', ['--force' => true])
+        ->expectsConfirmation('This permanently deletes venues and cities on this database. Continue?', 'yes')
+        ->assertExitCode(0);
+
+    expect(City::query()->find($meetup->city_id))->not->toBeNull();
+});