Red Flag
Live event venue in St. Louis, Missouri
- St. Louis, MO
- Venue location
- Live event venue
- Venue type
- 7 events
- Upcoming dates
- Visitor guide
- Arrival & venue details
About Red Flag
Red Flag is a concert venue at 3040 Locust Street in St. Louis. It is described as a 1,000-capacity space that can be scaled to suit different shows, so the feel of the room may vary depending on the event. For show-specific questions about access or visitor arrangements, the venue asks guests to contact the operator directly.
3040 Locust Street, St. Louis, MO 63103
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Plan Your Visit to Red Flag
Where is Red Flag, and how do you get there?
Red Flag is located at 3040 Locust Street in St. Louis, Missouri, ZIP code 63103. The contact listing also provides the venue phone number as 314-714-8678. If you need help with a specific show, the venue says to contact the operator directly for arrangements.
The venue’s notes mention a back parking lot accessed from Olive Street.
What is the layout like inside?
Red Flag is described as a concert venue with a 1,000-person capacity and a layout that can be scaled for different shows.
What should you know about entry, bags, and age rules?
Guests should expect security wand screening and bag searches at entry. The venue also says that physical ID is required for age-restricted admission, and photographs of ID are not accepted.
The venue states that outside beverages are not allowed. It also says there is no indoor smoking or vaping. These rules apply as written in the venue’s posted guidance.
Reentry is limited: only guests 21 and older may reenter, and they must have a wristband. Under-21 guests cannot reenter.
Are there any conduct rules to know before you go?
Yes. Red Flag prohibits stage jumping and crowd surfing. If you are attending a high-energy show, it is worth keeping that in mind before the music starts.
Red Flag FAQs
Does Red Flag have confirmed parking on-site?
The venue says there is a back parking lot off Olive Street with room for about 100 cars, but spaces are not guaranteed. Confirm any parking charge before arrival.
Can I bring a photo of my ID instead of the physical card?
No. The venue requires physical ID for age-restricted admission and does not accept photographs of ID.
Can I leave and come back later?
Only guests 21 and older may reenter, and they need a wristband. Under-21 guests cannot reenter.
Are outside drinks allowed?
No. The venue says outside beverages are not permitted.
Venue information checked 2026-11-14. Event layouts, policies and operating hours can change; consult the venue’s event instructions before traveling.
Sources & References
Venue photo credits
- Live music performance under red and purple stage lights. Image supplied by the site owner. — Image supplied by the site owner, User-provided image.