That building is now occupied by "Lakeside 2" and they will be opening there for the third year in 2017.
They have a website and I am told that you can order food on the website from your phone and they will deliver to the old store dock on the channel. That dock will be open this year just for the use of the restaurant.
This is the website for their other store on Union Ave and I assume that the site for the Weirs Boulevard store will be up by the time they open.
http://www.lakesidefamousroastbeef.com/menu