Seems to me 100% their loss, if they don't want you! I'm white and male, but the wrong side of 40. Occasionally I've faced ageist "humour". But anywhere that's unfriendly to older people, women, non-white people, would IMHO suck to work even if you were young, white, male etc. Wouldn't wanna work with prejudiced people even if they think I'm "like them". Working in a diverse inclusive team is far more joyful, as well as more productive. BTW in my current workplace, there's a lady who's both older and black. She's awesome at her job, has a unique set of skills built up over many years. IMHO she's irreplaceable as well as a fun nice person to work with. So thank goodness we don't have something that'd have made her feel unwelcome....