If you don't like what you see, head somewhere else. Mid-afternoons can be good. Think about it, it's a retail space and the more booths they can fit into a small space, the better the owner's chances at making some money! Maybe they're waiting for a black guy to go into a booth or a white guy or a pirate. If you're a guy hoping to suck some dick, whip it out! The partition maintains anonymity.
It's even safer if you don't have any open cuts or sores in your mouth.
Some have a bench built into the wall. Where do you find the booths? I've seen them vary in size from about as big around as a fist to being the size of a dinner plate. If you're there to suck dick, why do you need to pull out YOUR dick? If the other party is also interested, he will accept the offer and put his penis through the hole to be serviced. Most of them saw you go into a booth.