I've been to Tender for drinks and snacks a few times, but last week we took advantage of Restaurant Week to taste their offerings ($14 for a burger and a cocktail...what a steal!).
Good burgers, excellent potato skins (I've ordered them every time I've gone), and some very creative cocktails. If you're looking for $3 well drinks, hurry past, but if you'd like to step back in time and enjoy some piano-playing with your libation, the $10 or so for the cocktail is well worth it. Service at the tables has never been a problem; not sure about from the bartenders themselves.