A classic meeting room is an individual, soundproofed space with a large conference table and chairs. More modern meeting rooms may offer you tea, coffee, paper and pencils, and equipment for giving presentations. Find out whether the venue will be able to provide you with tea and water. The majority of meeting rooms have self-service facilities.
The best exhibition spaces have plenty of room to help people circulate. For example, a café filled with small tables wouldn't be considered an exhibition space in the traditional understanding of the term!