[lobe]

The way I have done it with both groups of friends and past partners is we rotate who chooses the activity, and that person pays that time. So if you can only be cheap and do picnic in the park that's fine, but if you want to spend more that's also ok. This works best if your friends (both poorer and richer) are not materialistic and don't keep count, and it needs to be a fairly steady group, 5 or less works best.