The World of Beer website is really good about accurately listing what they have in stock and is updated pretty much instantly. Punch in your location and use the "Find a Beer" link to search their draft selection. The beers are listed by brewery so you're looking for Small Town Brewery. You can search and save yourself a trip if it's not there. Although, World of Beer has been a great way for me to find lots of new good beers so you may want to go anways.
I live about 15 minutes away from their New Brunswick location so I go somewhat often. They have this amazing raspberry beer that I haven't been able to find anywhere else. I never thought of checking their website for what's in stock though, thanks for the tip!
If you join their club, you can link your card to an app they have and see what you've tried there before and what they currently have in stock. It's been a while since I've been since I moved away from the one I used to live right near by but if you go often enough it might be worth it for you. Glad the website info is helpful. Cheers!