As a general rule, a landlord can condition its rental on almost anything that it chooses - but there are several taboo areas that are excepted, such as discrimination based on race, ethnicity, sex, etc. If there is nothing in the lease to prohibit the purpose of the meeting that you propose (or the size of the meeting that you have said), it may well be that you would prevail in a court test of the question.
There is another consideration though. Some municipalities have zoning or similar restrictions on using private residences for purposes other than a private residence. In such situations, any group meeting of any size and for any purpose might well be prohibited. Confer with a good real estate attorney to get the specifics.
Answered on Apr 30th, 2012 at 9:51 AM