ditto. For as long as I can remember (and that's a long time) whenever I went out with people I knew, one guy did the math and we just split the checks evenly to the nearest (rounding up) dollar.
BTW, when I'm out only with my SO, unless the credit card transaction can be done at the table, I pay cash. I don't let my credit card out of my sight. Even with such diligence I had a card compromised last year.
A suggestion to you all: I get a text every time my cards are used including my debit card. This is literally zero inconvenience as the text comes in within seconds of me making the transaction. This is how I knew my card was compromised and I immediately notified the card issuer. As far as I can tell all the card issuers offer this feature. I'm also notified when there is a change in a recurring charge, e.g. Sirius, optimum, so I can call and tell them I want the promotional rate extended (does anyone pay more than $6 monthly for Sirius?)