I'm currently building a world for a D&D (Dungeons and Dragons) set in the far future, where humans have escaped from a nuclear war roughly 100 years from 2020. Humans have started coming back 200 years before the setting time, about 1,800 years from 2020, or 1,700 years after the nuclear war. The technological level is somewhat 19th century. Solar panels exist (From the humans), as with some measure of frozen food. However, gunpowder is almost exclusively used for cannons, with the smallest being a hand cannon, or a big gun to the biggest race.
Trains are mostly electrical (By Solar Power). However, I also have 18 races (Including the humans), which are mostly big, but many have tails and wings, and 4 are basically centaur races (I have a smaller version of a centaur, actually), plus basically a feathered raptor. All races are described below:
Pterians This race actually evolved from bats in this world. They have big wings (18-foot wingspan, or 9-foot wings, for specifics), and tails with 2 more sets of wings. They are 6 to 7 1/2 feet tall, with tails as long as they are.
Kannter This race has pale white horns and a spined tail (The spines are a support for a fan-like skin flap series, used by their ancestors for intimidation). They are mildly taller than humans.
Gern This race is an 8-foot tall orc race. Not much to say here.
Phanerae This race is from 6 feet to almost 8 feet, with women being shorter but heavier than men, due to their, for lack of a better word, thiccness.
Leonar This race, one of the centaur races, is half lion, half black man. It is the same way as the normal centaur way. They are roughly 6 to 7 feet tall.
Ashara This race, the second centaur race, is half Latino/a, half winged dragon with tail spikes. Roughly 7 feet tall.
Centaur Centaur Race Number 3. Exactly as the mythological version, but only 6 feet tall.
Zavran Centaur Race Four, Half anthropomorhpic scorpion, half giant scorpion. Only 5 to 6 feet tall.
Ceana Essentially humanoids with a mildly scaly human body and a big snake tail instead of legs. 13 to 16 feet long, but 6 to almost 7 feet tall when torso is raised.
Neirn This race has a 20-year-long larval stage, which is 2 feet tall. Its adult stage is a wolfish form, 5 feet-ish tall. The Larval stage is basically a Lalafell (From Final Fantasy XIV).
Maer This race is as tall as humans, but has a 3 foot mermaid tail.
Miqo'te Basically the Miqo'te race from Final Fantasy XIV. Males a tad shorter than humans, females significantly shorter than humans.
Drava This race is basically a dragon satyr race. They have draconic lower quarters (With a flexible tail usable as a weapon), and human upper quarters (With Draconic Wings). They pioneered the rail tech and solar panels.
Na'vi The alien race from James Cameron's Avatar, 10 foot tall blue humanoids without hair (Except on the end of their tail and eyelashes). Also the race I mentioned above (The part about the cannons).
Mitarn The raptor race I mentioned. They can sit two ways: Chicken (Body is perpendicular to seat, head is only as high above the body as the neck), or Owl (Body is at an angle to seat, head is higher than rest of body). They are 4 feet tall and 8 feet long. They have pretty flexible tails. They also have feathers.
Vaeran An insectoid race, 4 to 5 feet tall. They have 4 arms.
Avandra This rave is an ooze race, 2 to 3 feet tall.
Humans Basically us, but developed for living on Mars (Where the humans who escaped Earth went to after the war, but adapting for the low-gravity of Mars, but still able to live on Earth. How this is possible is irrelevant for the question).
Inktolings: The fictional race of a Inkling-Octoling hybrid, but can breed. Are usually 5 to almost 6 feet tall.
Alternians: The alien race of Homestuck. Evolved from bugs, have grubs as offspring, and have different blood, from red, and going up to violet with purple before that, and also fuschia. Tend to be around 6 feet tall.
Foodimals: The food creatures from Cloudy with a Chance of Meatballs 2. Can range from 1 foot tall to dinosaur size (30 feet long max). The larger ones simply request a box car for themselves.
Major Problems Okay, now that you read the races, I have the main problem. I know how a tail hole could work (Simply have a gap between the seat and wall, or simply have bus-like seats, but have tail holes), children (And the shorter races) can sit just fine in adult seats, and the seats are made to be for bigger races, possibly with steps on one side for smaller ones. However, I'd like the races to be able to be close together (For example, friends of several races), and having sections for the Mitarn and centaur races seems somewhat rude for people with those races for friends. Here are some basic facts:
- Most races have some body part that would get in the way (Wings, tails, bodies) of a "Normal" human seat. (Back connected to seat).
- The Centaur races (And the Mitarn) can sit fairly well with a human seat (The Centaur races can lie down on their animal sides, and the Mitarn can sit Chicken Style).
- The Avandra are particularly worrying, as they are both 3 feet tall and have no feet (They have a 2 inch thick layer of ooze where feet would be).
Here's the question: How in the world will the train seating be for a world with a lot of tails, 4 races that are centaurs, a raptor species, and 3 feet tall ooze people?