another point to races is what they do in Dresden files rpg, they have a power and the player fits it however he feels. “a creature with *claws* feature can be translated to any sharp appendage attached to the body, teeth, nails, thorns, unicorn spike and the like”
so a bar race doesn’t need to be one type of bat but the player picks a feature to represent the species they wanted to portray. radar sense, heightened smell, Hematophagy appetite, etc.
a heavy RP game relies on a players history and personality. D&D 5e started to apply this with inspiration points for players that keep to their personalities.
class statue could also play a part, in terms of avain race maybe those with wing like appendages could be a higher social class since the are closer with their ancient heritage or whatever.