We will be in Manhattan this Friday evening from out of town and are looking for somewhere to have a nice dinner within walking distance (10-15 minute walk) of where we are staying near 44th & Madison Ave (near Grand Central Station). We are most interested in the following: Indian cuisine, upscale Mexican or Text Mex, or gastropub (I know, all over the place but ....) -- preferably not too formal but a nice ambiance would be appreciated (no delicious but ambiance-less dives, please!). We'd be open to other cuisines too if the others don't pan out within walking distance (French, Italian). Any suggestions? Thank you in advance for your ideas!