Hi,
I live in Berlin, where the market is way down than anything i've seen (although the cost of life is down, my monthly rent all bills included is £240 and i live alone). In town a corporate / wedding will get you about 200/250 euro per musician. So you basically pay your rent and food with 2 or 3 gigs.
Outside of Berlin in cities with more money that rises to about 400/500 euro per person for 2 or 3 sets, and more...
I've had some amazing experience, some very bad. A barmitzva, by contract food has to be included for the band.... food looks amazing... BUT they had ordered pizza hut for the band. LOL... etc
In Belgium where i gig often, a wedding would be about 300 per musician.