(1) Many people like to drink. (2) Many people like to drink and dance. (3) Drinking and dancing are very often foreplay to more intimate endeavors. (4) The bigger the club for people to partake in said drinking and dancing, the more opportunities for foreplay. What are all these (fairly obvious) facts leading up to? That the Fenix Underground is one of the biggest--and swankiest--clubs in the city, and every weekend its dance floors are brimming with people. What's not to like about drinking and flirting (via dancing--as in rubbing and gyrating) with other people? The answer: Very little. BRADLEY STEINBACHER