I'd probably choose not to grab a beer -- unless the social cost/effort in saying no was higher than saying yes. Quite likely I'd feel put upon with having to respond in a way that I thought didn't offend you...and all by pithy text messages. What a hassle!

Totally get that's a me problem though and I'd fall into your 70%.

Thanks for the insights though -- I find the concept of friendship fascinating (if perplexing).