Two and a half decades looks good on the Saxon Pub. In the cutthroat live music capital, that type of longevity remains hard won. The neighborhood regulars that haunt the wood-hewn South Lamar songwriters’ sanctuary (capacity 150) might have sat at the original knights of the round table – and remain at the card table in the non-stage room. Chairs angle in toward the stage, surrounded by booths, all filled when Bob Schneider loads in Mondays with Lonelyland. Former patron saints including Stephen Bruton and “Mambo” John Treanor carry on in happy hours by guitar great Johnny Nichols and regular appearances by permutations of the Flatlanders.