Booking

Hi guys,

I’m looking for a booking plugin that should be farely simple..
– it’s not supposed to show availability, but has to have a maximum of bookings per night. (there are 7 rooms, so max. 7 customers can book the same night)
– it has to be free (i’d rather don’t want to register either..)

I found booking calendar, but it’s not working with my current theme.

Anyone got an idea?
Thanks!