Informal private event for 50
we are getting married at city hall on a Monday in July, and we wanted to organise an informal cocktail party for about 50 people. We wanted to have our friends drop by, have some hors-d'oeuvres or similar, and some wine and beer. We were planning on having it on the roof top of our building, unfortunately the max. capacity is 20 people.
Would you know of any restaurant/bar/etc, moderately priced, where we could organise something similar?