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Theatre Three

Theatre Three is an event space in Brentwood, New York. It seats a stated 408. Here is what the public record holds on it, and what an event67 rollout would cost in a room this size.

Price your eventWhat fits here
Stated capacity
408
people, as published
From JFK
69 km (43 mi)
John F. Kennedy International Airport
From the centre
24 km (15 mi)
of Brentwood

Figures as published in open data, retrieved 3 September 2026. Capacities vary by layout — confirm the one you want with the venue.

What Theatre Three is

It stands at 412 Main Street, 24 km (15 mi) from the centre of Brentwood.

408 is the kind of number that suits training, a chapter meeting or one track of a larger programme.

Address
412 Main Street, Port Jefferson, NY 11777
Coordinates
40.9438, -73.0679
Classified as
event space

Getting there

At 69 km (43 mi), John F. Kennedy International Airport (JFK) makes arrival day a travel day. Open registration the evening before if you can.

This is an out-of-centre venue — 24 km (15 mi) from the middle of Brentwood — which usually buys you parking and load-in access in exchange for a transport plan.

Brentwood has 15 venues mapped in total and a population of 60,664. The Brentwood guide covers the airport, the local time zone and what else is bookable nearby.

Formats this suits

This is a room for a workshop, a chapter meeting, a training day or one track of a larger programme. Anything with an exhibition attached needs a second space.

  • networking mixers

    An independent space with its own character, which a mixer benefits from more than a conference does.

  • fundraisers and galas

    A room with a personality is worth more at a gala than square footage is.

  • community meetings

    Room for 408 covers most community and member meetings.

Pricing a full house here

Suppose 410 attendees claim their invite and open the app at a Theatre Three event sized to the stated capacity of Theatre Three. Here is exactly what event67 charges, with the free 50 taken off the top.

activated attendees
410activated attendees
billable, after the first 50 are free
360billable, after the first 50 are free
for the whole event, at $5 each
$1,800for the whole event, at $5 each

You are billed for people, not for the room, so this figure does not change if you move the event down the road. event67 has no floor-plan or booking product — the venue handles the space, the app handles the people in it.

1,000
activated attendees at Theatre Three, and what each dot costsOne dot ≈ 10 attendees

Nearby alternatives

4 other venues in Brentwood have enough published detail for their own guide. Worth a shortlist before you commit.

Where these numbers come from

event67 is not affiliated with, endorsed by or connected to this venue or its operator. This page is compiled from open data and links to the venue’s own website where one is published.

  • Wikidata, CC0
  • Venue data © OpenStreetMap contributors, available under the Open Database License.
  • Geographic data © GeoNames, licensed under CC BY 4.0.
  • Retrieved 3 September 2026. 7 distinct facts from the record are rendered on this page: street address, stated capacity, capacity sizing, official website, encyclopaedia entry, nearest airport with distance, photograph on Wikimedia Commons.

Last updated

What it costs

Free up to 50
activated attendees, on one live event
$5
per activated attendee beyond 50
$4,750
the most one event can ever cost, whatever happens past 1,000

Activated means the person claimed their invite and opened the app. Not when you import them, not when the invite is delivered, and not if they register and stay home.

See the full pricing

Questions people actually ask

How many people does Theatre Three hold?

Open data records a stated capacity of 408 for Theatre Three. That figure is what the venue or an encyclopaedia entry published, and it is usually the maximum seated number — theatre, banquet and reception layouts in the same room can differ by half. Confirm the layout you want directly with the venue.

Where is Theatre Three?

412 Main Street, Port Jefferson, NY 11777. It is 24 km (15 mi) from the centre of Brentwood. The nearest major airport is John F. Kennedy International Airport (JFK), about 69 km (43 mi) away.

What does an event app cost for an event at Theatre Three?

410 activated attendees means 360 billable after the free 50, so $1,800 for the event. That example is sized to the stated capacity of Theatre Three. The rate is $5 per activated attendee beyond the first 50, and the total for one event stops at $4,750 however many more attend. Activated means the person claimed their invite and opened the app. Not when you import them, not when the invite is delivered, and not if they register and stay home.

Is event67 affiliated with Theatre Three?

No. event67 is not affiliated with, endorsed by or connected to this venue or its operator. This page is compiled from open data — OpenStreetMap, Wikidata and public census sources — and links to the venue’s own website where one is published.

What else is nearby if Theatre Three is booked?

Pritchard Gymnasium (1,760), Patchogue Theatre (1,200) and Cherry Grove Community House and Theatre are in the same city and have their own pages here. 15 venues in total are mapped in Brentwood.

Keep reading

Running an event at Theatre Three?

Bring the schedule, the invites and the arrivals into one branded app. Free for your first 50 activated attendees, on one live event.

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