01 · business & events
stage & connection.
Product presentations, launches, networking and company parties. Your moment on stage first, then conversations at the bar.
for companies
event venue · mainz old town
from morning espresso to evening cocktails.
The butter.fly event boutique offers 1,076 sq ft (100 m²) for product presentations, networking and celebrations – with an in-house kitchen and bar, and no curfew.
100 m²
1,076 sq ft, flexible layout
up to 120
guests
old town
mainz
30 min
to frankfurt airport
two paths, one standard
what are you planning?
02 · celebrate & private
emotion & exclusivity.
Birthdays, milestones and private dinners. Your celebration with signature drinks, genuine hospitality and no curfew.
celebrate privately
why butter.fly
not a conference room.
not a conference room.
a host.
The event boutique is run by the team behind butter.fly | brunch & bar. coffee & cocktails. So you don't just rent a room – you get hosts who welcome guests every single day.
day & night.
Daylight and barista coffee by day, warm light and signature drinks in the evening. One place for the whole day, no change of venue.
in-house kitchen & bar.
Brain food from our brunch kitchen and cocktails from our bar. No external caterer needed, and a single point of contact for everything.
no curfew.
The room is soundproofed and there's no curfew, so you can party late into the night by arrangement. Right in Mainz Old Town, 30 minutes by car from Frankfurt Airport.
the venue
your home away from home.
Exposed concrete, wood, plants and warm light across 1,076 sq ft (100 m²), set up fresh for every event.
stage.
For your presentation, keynote or speech, AV on request.
lounge.
Sofas by the window for receptions, breaks and conversation.
long table.
One long table or separate islands for dinner, lunch and workshops.
dance floor.
Party late into the night, no curfew.
product display.
Show your product, let guests try it, start conversations.
outdoor area.
Small, for the welcome drink and some fresh air.
- addressGroße Langgasse 12, 55116 Mainz (Old Town), Germany
- getting hereA 3-minute walk from the nearest parking garage, about 30 minutes by car from Frankfurt Airport
frequently asked questions
short & clear.
How many guests fit in the butter.fly event boutique?
Depending on the format: 15–30 people in U-shape or boardroom style, up to 60 in theater-style seating (with rented furniture) and up to 120 for a standing reception.
Where is the venue?
In Mainz Old Town, at Große Langgasse 12, 55116 Mainz. The nearest parking garage is a 3-minute walk away, and Frankfurt Airport is about 30 minutes by car.
Is there a curfew?
No. Thanks to excellent soundproofing, you can party late into the night by arrangement. How long you can stay depends on your booking option and event.
Who takes care of catering and drinks?
We do. Food comes from our own kitchen, coffee and drinks from our bar – from barista coffee in the morning to a signature cocktail at night. No external caterer needed, though you're welcome to bring one by arrangement, for a handling fee.
How much does an event at the butter.fly event boutique cost?
It depends on the format. For business events such as product presentations and networking, we offer a per-person package, including, for example, room, welcome snack, lunch and drinks, with tech on request. Celebrations and all other events are priced individually, depending on weekday, time, number of guests and food and drinks. After your inquiry, we'll get in touch to discuss the details and send you a tailored quote.
your date
tell us about your occasion.
Date, number of guests and occasion are all we need to get started. We'll get back to you to discuss the details for your quote.