The photo booth should be easy to find without sending your guests on a small expedition.
Choose the spot while you are planning the room
When you are arranging a birthday, mitzvah, anniversary or wedding, the tables and dance floor tend to get first dibs. The photo booth gets whatever space survives. I would give it a place in the conversation earlier.
Ask the venue and booth provider to review the location together. Confirm the space their setup needs, including the backdrop, equipment and room for guests. A booth fitting against a wall does not mean a group of cousins fits in front of it.
My preference is a spot guests can notice from the main gathering area without putting the booth in the middle of everything. Close enough to feel included. Far enough away that nobody has to dodge a group photo on the way to dinner.
Plan for the people waiting, too
The booth is only part of the footprint. People gather, choose props, wait for friends and decide they need one more picture. Apparently the first seven were rehearsals.
Look at where that group will stand. Keep doorways, service routes and accessible paths clear, and have the venue confirm the layout. Leave room for guests using mobility aids to approach and participate comfortably.
Ask the provider how their setup works for seated guests and groups of different heights. If props or a screen are part of the experience, think about whether people can reach them. These are useful planning questions, not details to discover after everyone arrives.
Give it a clear place in the evening
I recommend deciding when the booth opens, when it closes and whether it pauses for any formal moments. Share that plan with the provider and whoever is running the event.
You may want guests taking pictures while they mingle. You may want their attention on a candle-lighting ceremony, an award or a toast. Agree on the cues so the booth and the microphone are not asking the room to do two things at once.
A brief announcement can help guests find it. Clear signage can do the same. You do not need to interrupt the party repeatedly to remind everyone that a camera exists.
Check the setup before the room fills
Confirm power, lighting, access and setup timing with the venue and provider. Ask what the booth needs for any printing or digital sharing you have chosen, including whether that setup depends on an internet connection.
Then walk the route as a guest. Can you spot the booth? Get to it easily? Wait without blocking someone? Return to the celebration without crossing through a speech?
That is the goal: an easy little detour that adds to the night. Give the booth a proper home, then let your guests supply the questionable poses.
For your own event
Choose the booth location with the venue and provider before the room layout is settled.
Allow space for waiting guests and comfortable access while keeping routes clear.
Agree on operating times, event cues and technical needs before guests arrive.