Metzger's Pub and Tavern has been around West Seneca as long as I can remember. It is a good place to go for a Roast Beef dinner and the service is excellent.
However on Friday nights and weekends - the bar does get a little on the busy side and you have to deal with the drinking crowds. The parking lot also isn't as big as the seating available inside as well - so you better get there early if you want to save some steps!
Occassionally they also have a live band on the weekend (catering to the bar business) which doesn't help a casual conversation over dinner. But if you're looking for a good roast beef - this is the place to go.