Having lots of leads (calls, web inquiries) coming to you is an important part of building your business.
Eventective.com is a site that does just that.
Sign up for a free account and make sure to check the box to opt in to their email. Potential customers go to this site to solicit proposals from multiple event venues. When they submit their info it is emailed to event planners: you will see the type of event, budget, date, attendees and more.
If it looks like a good opportunity you buy the lead and contact them immediately. You are likely to get a lot of email everyday so you need to weed through the 'bad ones' to find the right opportunities for the pub.
