A wedding site that offers nearly everything needed for a wedding or special event–catering, linens, tables, etc. is identified as an on-site or on-premise location.
Examples of On-Site Venues:
- Country Club
- Full-Service Hotel
- Full-Service Banquet Facility
Merriam-Webster Online Dictionaryon-site (adverb or adjective)
at a particular place especially of business - printed on–site on–site day care