St. Augustine Wedding Guide

COS Celebrations

St. Augustine wedding DJ and MC company that layers live musicians, most often a saxophonist, over the DJ set.

Guests with arms raised and glow sticks on a black and white checkered dance floor under string lights at night, seen from behind the DJ's turntable

DJ + Drums + Sax - Jacksonville Wedding DJ - COS Celebrations

COS Celebrations founder Corey Peterson playing saxophone in the middle of a packed dance floor at the Fountain of Youth, the bride beside him and guests waving foam glow sticks
Sepia-toned photo of a saxophonist playing beside the DJ at a white booth in front of the tall windows at The White Room, the DJ working the decks with headphones around his neck
A drummer at a full kit playing beside the DJ setup at River House, tall white-framed windows and blue uplighting behind him and a second musician standing to the left
Bridesmaids in sage green dresses and guests in white cowboy hats waving foam glow sticks on a crowded dance floor at the Fountain of Youth
A groom lifting and spinning his bride, her dress flaring out, during their first dance under string lights at the Lightner Museum
Black and white photo of a bride and groom kissing on the dance floor at Treasury on the Plaza with guests gathered in a ring around them

Swipe for more photos. Tap to enlarge.

Photos: Brittany Morgan, Simply Grace Photography, Gaige Lancaster, Miranda Rose Photography, Walls of Jericho

Service area
St. Augustine, Florida - no travel fee within 50 miles; also works Jacksonville, Ponte Vedra Beach, Amelia Island, Orlando and Tampa
Phone
904-615-7132
Website
coscelebrations.com
Starting price
Packages from $1,500

About COS Celebrations

COS Celebrations is a St. Augustine wedding DJ company started in 2022 by Corey Peterson, a St. Augustine native who has worked weddings here since the early 2000s, first as a saxophonist. The team is 8 DJs and musicians plus a client services coordinator, playing about 600 weddings a year in the St. Augustine area. A DJ and MC come with every booking; live saxophone over the DJ set is the signature add-on, with drums, violin, piano, guitar and brass available, and piano or violin for ceremonies and cocktail hours. Regular venues include Treasury on the Plaza, the Lightner Museum, The White Room, River House and the Fountain of Youth.

Ask what sets them apart and the answer is about who the day belongs to. Most of the team are working musicians, and they describe the job as curating the soundtrack of the couple's day from the couple's taste, not the DJ's and not the planner's. On the microphone that means no gimmicks and no count-along cheers; announcements are short and said with intention. On the dance floor it means beat-matched sets built by reading the room, and letting an anthem play through when the floor is singing it. They say they fit couples who want a night built around them, quiet or full-on party, and not a couple who wants a playlist played in order. In their words: "It's not about us; it's your event."

Credentials & experience

Questions couples ask

What is your MC style on the microphone?

Minimal and tasteful. No cheesy gimmicks, no count-along cheers, no yelling introductions. Everything said on the mic has a purpose, and the hype comes at the right moment rather than all night.

Do you mix songs together, and how do you pick what to play?

Seamless beat matching through the dance set, built by reading the room that night rather than a fixed list. The DJ watches the floor and decides when to transition, and anthems get played through - cutting a sing-along short is the quickest way to lose a room.

What happens if our DJ gets sick?

There is a whole team, and the company tries to keep a full-time DJ off and available on every wedding day as cover. In twenty-plus years the founder has never called out of a wedding.

What comes in the basic package?

Everything the day needs: microphones, speakers and sound wherever it is needed, including the ceremony and cocktail hour, a professional MC, curated playlists, and the COS planning app where the music and the timeline live. No call the week of the wedding asking you to add gear.

Why does pricing run from $1,500 to $3,000?

Event length, add-ons such as live saxophone or uplighting, and which DJ you book. The founder's own packages start higher because of demand; newer team members book at the lower end. Events within 50 miles of St. Augustine have no travel fee.

What do couples get wrong when booking a DJ?

Judging by highlight reels. Anyone can look like a rock star with editing. Talk to the DJ, make sure the vibe fits and the conversation does not feel forced, and ask about the sound system - the right speakers and subs for the room, run at a volume where the dance floor is loud and the back tables can still talk.

Reviews

Google - 5.0 (197) The Knot - 5.0 (179) WeddingWire - 5.0 (132)

Elsewhere online

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Listing last verified: 2026-10-10