Halloween Extravaganza: Interstellar Nightmare
Halloween Extravaganza 2026 transforms O-Bar & Patio at Otonomus Hotel into an immersive “Interstellar Nightmare” with trap violinist Clejan, live performers, DJs, costumes, and a championship costume competition.
On Halloween night, step into the aftermath of a deep-space mission gone terribly wrong. Halloween Extravaganza 2026: Interstellar Nightmare takes over Otonomus Hotel on Saturday, October 31, for an adults-only night of live music, immersive entertainment, costumes, and nightlife.
The experience is designed around a sci-fi horror storyline in which a research vessel has returned from deep space—but its crew may no longer be what they once were. The story unfolds throughout the venue with atmospheric performers, lighting, music, and interactive elements surrounding the crowd.
Clejan Headlines Halloween Night
Trap violinist Clejan headlines the night with a 45-minute set beginning at 8:30 p.m.
Known for blending classical violin technique with trap and hip-hop, Clejan will also make pop-up appearances throughout the evening as the party continues.
Stormie Andrews serves as master of ceremonies, with additional live musicians, atmosphere dancers, and performers woven into the event throughout the night.
Interstellar Nightmare Costume Championship
Guests are encouraged to lean into the Interstellar Nightmare theme with costumes combining outer space, science fiction, monsters, horror, and anything imaginative enough to stand out.
Reigning 2025 champion Gio returns to defend his crown in the 2026 Costume Championship.
Costume Championship entry is available as a $25 add-on with General Admission and is included with VIP admission.
Halloween Extravaganza Tickets
General Admission: $95 per person
- Access to O-Bar and the patio
- Clejan live performance
- DJ and MC entertainment
- Atmosphere cast and pop-up performers
- Costume Championship entry available for an additional $25
VIP Admission: $195 per person
- Priority entry and dedicated VIP line
- Private VIP lounge on the O-Bar patio
- Galactic Bites
- Welcome drink ticket
- Exclusive photo opportunities
- Gift bag
- Costume Championship entry included
Advance registration is required. There will be no walk-up admission, and each guest must be on the confirmed guest list.
Event Details
Date: Saturday, October 31, 2026
Time: 8:00 p.m.–12:00 a.m.
Venue: Otonomus Hotel – O-Bar & Patio
Address: 5050 W Russell Rd, Las Vegas, NV 89118 (Map It)
General Admission: $95
VIP: $195
Costume Championship: $25 add-on with GA; included with VIP
Age: 21+
Entry: Advance registration required; no walk-ups
For more Halloween parties, attractions, and seasonal events, visit our Halloween in Las Vegas guide.
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