I think I want to bump this pretty soon; I spend more than my $2k/mo take-home on car payment + gas ($1k+), food ($500-$1k; I buy expensive/healthy groceries), exercise ($200-500/mo), (free rent), minimal toy/entertainment budget, etc. -- if I didn't have savings and credit, living on $2k/mo would be a big distraction.
Founders making $120-150k+/yr early seems like a distraction too, but I don't think $60-90k/yr is totally unreasonable in the Bay Area.
in the USA if you do not pay more than $1600 per month salary for those who work overt time that computer engineer is an automatic non exempt employee by one particular Federal job act law and there are some more laws on top of that..
I would like to join a rock climbing gym, maybe do crossfit, and krav magazine at some point, too.
I probably expend $250++ per month in ammunition, too, but I am drawing down a stockpile so I don't have to move it.
As an other extreme - for my first startup, I raised $15k and only used up $13k over a year and a half. Though at that time my blog was a small stream of passive income.
One thing I do try to do is expense everything that is reasonable.