Pasadena-based LeisureLink, which operates an online system for connecting vacation rental properties with travel agents and web booking, has linked with a new automated group hotel booking engine, Groupize.com, the two said this morning. The two said that LeisureLink's independent vacation and hotel properties will be available via Groupize, giving users of that service access to over 1,000 independent vacation rentals, timeshares, villas, condo hotels and boutique resorts throughout the U.S. and Canada. Groupize operates an online site which allows travel planners to book five or more rooms at special group rates, and also provides group and social management tools for those bookings. Details of the partnership between the two companies was not announced. LeisureLink is backed by Clearstone Venture Partners, Mission Ventures, and Wyndham Worldwide, and is headed by Erik Hovanec.