Bennigan's went bankrupt circa 2008 (nearly killing the chain), so naturally there are lots of them. Some closed before.

Arlington721 N Watson Rdnow Alyoku Steak Sushi & Bar
Austin13995 N. U.S. Highway 183Extensively renovated in 2014, now FoxHole Culinary Tavern.
Beaumont325 Interstate 10 NorthClosed in 2006, reopened as Saltgrass Steak House in 2013
College Station1505 Texas AveConverted into a rather spacious AT&T store
Friendswood1300 West Bay Area Blvd.Later Los Cucos, which is now closed
Houston1030 West Sam Houston NorthClosed ~2005, torn down for Interstate 10 widening
10690 Northwest Freewaynow Los Cucos Mexican Cafe
10811 Westheimer Roadnow Dimassi's Mediterranean Buffet
3963 Kirby DriveNow Allegiance Bank [there is another restaurant on the property, but Bennigan's became a bank]
1200 McKinney St.Suite 475 in the Shops at Houston Center, unknown what replaced it
12008 East Freewaycannot fully determine if it's Crazy Alan's Swamp Shack or Chulas Sports Cantina
211 W. FM 1960 (Cypress Creek Pkwy.)strip center location
4505 FM 1960
2700 S. Loop W.Chacho's Mexican now.
9811 Bissonett Finger Licking Restaurant
7143 Gulf Freewaystill vacant
6501 Southwest Freewayclosed prior to 2001, now Don Carlos Mexican Restaurant
222 N. Sam Houston Parkway EastDemolished December 2009
5015 Westheimer (inside The Galleria)Became Rainforest Cafe, which is now Footaction USA after Rainforest Cafe closed in early 2018
8401 Westheimer Road Ste 190Later a short-lived 59 Diner, closed ~2013, now Great Kahn Mongolian Grill.
San Marcos4025 Interstate 35 SouthLater River City Bar & Grill, which has since closed.