What's with going out with an acquaintance, them offering to pay, and then after you say Really Thanks, they say, "Ah, get me next time."
Wait, what? WHAT?
I get that this is usually acceptable, but when you're a broke vegetarian, the Ah-Get-Me-Next-Time is like the killer coming back to life (MINOR SCREAM SPOILER) after Sydney has shot him already! Good gravy--the stress.
A. What if the next time we go out, we go somewhere really nice? Is it still my turn to pay?
B. Frankly, it's about a 75% chance that I will spend less money than my dining companion--no matter what restaurant we go to because I don't eat meat, and I don't order alcohol.
C. What if we go out with other people? It seems silly to randomly announce, "Yeah, and I'm picking up his/hers too!" And then is the person thinking, "Why isn't Alice picking up my bill?"
When you have a system ("You do dinner, I do the movie") or something similar, that's okay. But, I'd really rather just hash it out or split the dang bill to begin with.